Filtration Tools & Reference Tables
Interactive calculators, conversion tables and technical references for common filtration questions. For a precise selection, contact our engineers.
Interactive tools
Filtration Calculators & Tools
Quick calculators for everyday filtration questions. For a precise selection, contact our engineers.
Micron to Mesh Converter
Convert between micron and mesh filter sizes
Nearest standard
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β-Ratio to Efficiency Converter
Convert filter beta ratio (β) to filtration efficiency percentage
Class
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ISO 4406 Code Decoder
Decode ISO 4406 contamination codes to understand particle count ranges in hydraulic fluids.
≥4 µm
—
particles per ml
≥6 µm
—
particles per ml
≥14 µm
—
particles per ml
Typical system
—
Recommended filtration
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Enter three ISO scale numbers separated by slashes, for example 18/16/13.
Technical reference
Technical conversion & reference tables
Practical unit conversions, filtration classifications, thread connections and flange dimensions in one place. In the conversion tables, multiply the first-column value by the stated factor unless a formula is shown.
Unit conversion
Pressure
| Convert from | Convert to | Multiply by |
|---|---|---|
| Atmosphere (atm) | Bar | 1.01325 |
| Atmosphere (atm) | PSI | 14.69595 |
| Atmosphere (atm) | Inches Hg | 29.92126 |
| Bar | Kilogram-force / m² | 10,197.162 |
| Bar | PSI | 14.50377 |
| Millibar | Inches Hg | 0.02952999 |
| Pascal (Pa) | Bar | 0.00001 |
| Pascal (Pa) | PSI | 0.000145038 |
| Bar | Atmosphere (atm) | 0.9869233 |
| PSI | Atmosphere (atm) | 0.06804596 |
| Inches Hg | Atmosphere (atm) | 0.03342105 |
| Kilogram-force / m² | Bar | 9.80665 × 10−5 |
| PSI | Bar | 0.06894757 |
| Inches Hg | Millibar | 33.86389 |
| Bar | Pascal (Pa) | 100,000 |
| PSI | Pascal (Pa) | 6,894.757 |
Unit conversion
Distance
| Convert from | Convert to | Multiply by |
|---|---|---|
| Centimetres | Feet | 0.0328084 |
| Centimetres | Inches | 0.393701 |
| Metres | Feet | 3.28084 |
| Metres | Inches | 39.3701 |
| Metres | Yards | 1.09361 |
| Microns (µm) | Inches | 0.0000393701 |
| Microns (µm) | Metres | 0.000001 |
| Microns (µm) | Millimetres | 0.001 |
| Millimetres | Feet | 0.00328084 |
| Millimetres | Inches | 0.0393701 |
| Feet | Centimetres | 30.48 |
| Inches | Centimetres | 2.54 |
| Feet | Metres | 0.3048 |
| Inches | Metres | 0.0254 |
| Yards | Metres | 0.9144 |
| Inches | Microns (µm) | 25,400 |
| Metres | Microns (µm) | 1,000,000 |
| Millimetres | Microns (µm) | 1,000 |
| Feet | Millimetres | 304.8 |
| Inches | Millimetres | 25.4 |
Approximate reference
Micron ↔ mesh conversion
Mesh is the number of openings per linear inch; it is not a universal particle-size unit. Actual aperture depends on wire diameter and the sieve standard. Values below are nominal US/ASTM-style sieve openings.
| Mesh no. | Nominal opening | Microns (µm) | Millimetres |
|---|---|---|---|
| 4 | 0.187 in | 4,750 | 4.75 |
| 5 | 0.157 in | 4,000 | 4.00 |
| 6 | 0.132 in | 3,350 | 3.35 |
| 7 | 0.110 in | 2,800 | 2.80 |
| 8 | 0.0937 in | 2,360 | 2.36 |
| 10 | 0.0787 in | 2,000 | 2.00 |
| 12 | 0.0661 in | 1,700 | 1.70 |
| 14 | 0.0555 in | 1,400 | 1.40 |
| 16 | 0.0469 in | 1,180 | 1.18 |
| 18 | 0.0394 in | 1,000 | 1.00 |
| 20 | 0.0331 in | 850 | 0.850 |
| 25 | 0.0278 in | 710 | 0.710 |
| 30 | 0.0234 in | 600 | 0.600 |
| 35 | 0.0197 in | 500 | 0.500 |
| 40 | 0.0165 in | 425 | 0.425 |
| 45 | 0.0139 in | 355 | 0.355 |
| 50 | 0.0117 in | 300 | 0.300 |
| 60 | 0.0098 in | 250 | 0.250 |
| 70 | 0.0083 in | 212 | 0.212 |
| 80 | 0.0071 in | 180 | 0.180 |
| 100 | 0.0059 in | 150 | 0.150 |
| 120 | 0.0049 in | 125 | 0.125 |
| 140 | 0.0042 in | 106 | 0.106 |
| 170 | 0.0035 in | 90 | 0.090 |
| 200 | 0.0030 in | 75 | 0.075 |
| 230 | 0.0025 in | 63 | 0.063 |
| 270 | 0.0021 in | 53 | 0.053 |
| 325 | 0.0018 in | 45 | 0.045 |
| 400 | 0.0015 in | 38 | 0.038 |
Unit conversion
Volume & flow
| Convert from | Convert to | Multiply by |
|---|---|---|
| Cubic centimetres (cm³) | Cubic feet (ft³) | 0.0000353147 |
| Cubic centimetres (cm³) | Cubic inches (in³) | 0.0610237 |
| Cubic centimetres (cm³) | Litres | 0.001 |
| Cubic centimetres (cm³) | US gallons | 0.000264172 |
| Cubic metres (m³) | Cubic feet (ft³) | 35.3147 |
| Cubic metres (m³) | Cubic inches (in³) | 61,023.744 |
| Cubic metres (m³) | Litres | 1,000 |
| Cubic metres (m³) | US gallons | 264.172 |
| Litres | Cubic centimetres (cm³) | 1,000 |
| Litres | Cubic feet (ft³) | 0.0353147 |
| Litres | Cubic inches (in³) | 61.0237 |
| Litres | Imperial gallons | 0.219969 |
| Litres | US gallons | 0.264172 |
| Litres / min | Cubic centimetres / min | 1,000 |
| Litres / min | Cubic feet / min | 0.0353147 |
| Litres / min | US gallons / min | 0.264172 |
| Cubic feet (ft³) | Cubic centimetres (cm³) | 28,316.847 |
| Cubic inches (in³) | Cubic centimetres (cm³) | 16.387064 |
| Litres | Cubic centimetres (cm³) | 1,000 |
| US gallons | Cubic centimetres (cm³) | 3,785.412 |
| Cubic feet (ft³) | Cubic metres (m³) | 0.02831685 |
| Cubic inches (in³) | Cubic metres (m³) | 1.6387064 × 10−5 |
| Litres | Cubic metres (m³) | 0.001 |
| US gallons | Cubic metres (m³) | 0.003785412 |
| Cubic centimetres (cm³) | Litres | 0.001 |
| Cubic feet (ft³) | Litres | 28.31685 |
| Cubic inches (in³) | Litres | 0.01638706 |
| Imperial gallons | Litres | 4.54609 |
| US gallons | Litres | 3.785412 |
| Cubic centimetres / min | Litres / min | 0.001 |
| Cubic feet / min | Litres / min | 28.31685 |
| Imperial gallons / min | Litres / min | 4.54609 |
Unit conversion
Energy, power & torque
Horsepower is power; horsepower-hour is energy. The original energy entries are labelled here by their correct dimensions.
| Convert from | Convert to | Multiply by |
|---|---|---|
| Kilojoules (kJ) | Horsepower-hours (hp·h) | 0.000372506 |
| Kilowatts (kW) | Mechanical horsepower (hp) | 1.341022 |
| Newton metres (N·m) | Inch-pounds force (lbf·in) | 8.850746 |
| Newton metres (N·m) | Foot-pounds force (lbf·ft) | 0.737562 |
| Horsepower-hours (hp·h) | Kilojoules (kJ) | 2,684.52 |
| Mechanical horsepower (hp) | Kilowatts (kW) | 0.745700 |
| Inch-pounds force (lbf·in) | Newton metres (N·m) | 0.112985 |
| Foot-pounds force (lbf·ft) | Newton metres (N·m) | 1.355818 |
Unit conversion
Mass
| Convert from | Convert to | Multiply by |
|---|---|---|
| Grams | Pounds (lb) | 0.00220462 |
| Kilograms | Grams | 1,000 |
| Kilograms | Pounds (lb) | 2.20462 |
| Metric tonnes (t) | US short tons | 1.102311 |
| Pounds (lb) | Grams | 453.59237 |
| Grams | Kilograms | 0.001 |
| Pounds (lb) | Kilograms | 0.45359237 |
| US short tons | Metric tonnes (t) | 0.9071847 |
Unit conversion
Area
| Convert from | Convert to | Multiply by |
|---|---|---|
| Square centimetres (cm²) | Square inches (in²) | 0.1550003 |
| Square centimetres (cm²) | Square feet (ft²) | 0.001076391 |
| Square centimetres (cm²) | Square yards (yd²) | 0.000119599 |
| Square kilometres (km²) | Square inches (in²) | 1.550003 × 109 |
| Square kilometres (km²) | Square feet (ft²) | 1.076391 × 107 |
| Square kilometres (km²) | Square yards (yd²) | 1,195,990 |
| Square metres (m²) | Square inches (in²) | 1,550.003 |
| Square metres (m²) | Square feet (ft²) | 10.76391 |
| Square metres (m²) | Square yards (yd²) | 1.19599 |
| Square inches (in²) | Square centimetres (cm²) | 6.4516 |
| Square feet (ft²) | Square centimetres (cm²) | 929.0304 |
| Square yards (yd²) | Square centimetres (cm²) | 8,361.274 |
| Square inches (in²) | Square kilometres (km²) | 6.4516 × 10−10 |
| Square feet (ft²) | Square kilometres (km²) | 9.290304 × 10−8 |
| Square yards (yd²) | Square kilometres (km²) | 8.361274 × 10−7 |
| Square inches (in²) | Square metres (m²) | 0.00064516 |
| Square feet (ft²) | Square metres (m²) | 0.09290304 |
| Square yards (yd²) | Square metres (m²) | 0.8361274 |
Formula conversion
Temperature
| Convert from | Convert to | Formula |
|---|---|---|
| Celsius (°C) | Fahrenheit (°F) | (°C × 9/5) + 32 |
| Fahrenheit (°F) | Celsius (°C) | (°F − 32) × 5/9 |
| Celsius (°C) | Kelvin (K) | °C + 273.15 |
| Kelvin (K) | Celsius (°C) | K − 273.15 |
| Fahrenheit (°F) | Kelvin (K) | (°F − 32) × 5/9 + 273.15 |
| Kelvin (K) | Fahrenheit (°F) | (K − 273.15) × 9/5 + 32 |
ISO 16889 reference
Beta ratio (β) & filtration efficiency
Efficiency = (1 − 1/β) × 100%
βx(c) = upstream particles ≥ x µm(c) ÷ downstream particles ≥ x µm(c)
| Beta ratio | Efficiency | Particles passing | Plain-language meaning |
|---|---|---|---|
| β = 1 | 0% | 100% | No measured removal at the stated particle size |
| β = 2 | 50% | 50% | 1 of every 2 particles passes |
| β = 5 | 80% | 20% | 1 of every 5 particles passes |
| β = 10 | 90% | 10% | 1 of every 10 particles passes |
| β = 20 | 95% | 5% | 1 of every 20 particles passes |
| β = 50 | 98% | 2% | 1 of every 50 particles passes |
| β = 75 | 98.67% | 1.33% | 1 of every 75 particles passes |
| β = 100 | 99% | 1% | 1 of every 100 particles passes |
| β = 200 | 99.5% | 0.5% | 1 of every 200 particles passes |
| β = 1,000 | 99.9% | 0.1% | 1 of every 1,000 particles passes |
ISO 4406 cleanliness code
Particles per millilitre
A three-part code is reported as ≥4 µm(c) / ≥6 µm(c) / ≥14 µm(c). Each step upward approximately doubles the permitted particle-count range.
| Scale number | More than particles/ml | Up to and including particles/ml |
|---|---|---|
| 0 | 0 | 0.01 |
| 1 | 0.01 | 0.02 |
| 2 | 0.02 | 0.04 |
| 3 | 0.04 | 0.08 |
| 4 | 0.08 | 0.16 |
| 5 | 0.16 | 0.32 |
| 6 | 0.32 | 0.64 |
| 7 | 0.64 | 1.3 |
| 8 | 1.3 | 2.5 |
| 9 | 2.5 | 5 |
| 10 | 5 | 10 |
| 11 | 10 | 20 |
| 12 | 20 | 40 |
| 13 | 40 | 80 |
| 14 | 80 | 160 |
| 15 | 160 | 320 |
| 16 | 320 | 640 |
| 17 | 640 | 1,300 |
| 18 | 1,300 | 2,500 |
| 19 | 2,500 | 5,000 |
| 20 | 5,000 | 10,000 |
| 21 | 10,000 | 20,000 |
| 22 | 20,000 | 40,000 |
| 23 | 40,000 | 80,000 |
| 24 | 80,000 | 160,000 |
| 25 | 160,000 | 320,000 |
| 26 | 320,000 | 640,000 |
| 27 | 640,000 | 1,300,000 |
| 28 | 1,300,000 | 2,500,000 |
Worked reference
ISO 4406 example codes
| Example code | ≥4 µm(c) | ≥6 µm(c) | ≥14 µm(c) |
|---|---|---|---|
| 14 / 12 / 9 | >80–160/ml | >20–40/ml | >2.5–5/ml |
| 16 / 14 / 12 | >320–640/ml | >80–160/ml | >20–40/ml |
| 18 / 16 / 13 | >1,300–2,500/ml | >320–640/ml | >40–80/ml |
| 20 / 18 / 15 | >5,000–10,000/ml | >1,300–2,500/ml | >160–320/ml |
| 22 / 19 / 16 | >20,000–40,000/ml | >2,500–5,000/ml | >320–640/ml |
Example codes describe particle-count bands only; the required target cleanliness depends on the component manufacturer and operating conditions.
ISO 16890
General ventilation air-filter groups
| ISO 16890 group | Classification basis | Reported class examples | Typical role |
|---|---|---|---|
| ISO Coarse | ePM10 below 50%; gravimetric arrestance reported | ISO Coarse 60% | Large dust, insects, fibres and prefiltration |
| ISO ePM10 | ePM10 efficiency ≥50% | ISO ePM10 50–95% | Coarse airborne particulate and pollen |
| ISO ePM2.5 | ePM2.5 efficiency ≥50% | ISO ePM2.5 50–95% | Fine particulate matter and combustion particles |
| ISO ePM1 | ePM1 efficiency ≥50% | ISO ePM1 50–95% | Very fine particulate matter |
Legacy EN 779:2012
Coarse, medium & fine filter classes
| Legacy class | Average arrestance / efficiency | Minimum 0.4 µm efficiency |
|---|---|---|
| G1 | Average arrestance <65% | Not specified |
| G2 | Average arrestance 65–<80% | Not specified |
| G3 | Average arrestance 80–<90% | Not specified |
| G4 | Average arrestance ≥90% | Not specified |
| M5 | Average 0.4 µm efficiency 40–<60% | Not specified |
| M6 | Average 0.4 µm efficiency 60–<80% | Not specified |
| F7 | Average 0.4 µm efficiency 80–<90% | ≥35% |
| F8 | Average 0.4 µm efficiency 90–<95% | ≥55% |
| F9 | Average 0.4 µm efficiency ≥95% | ≥70% |
Indicative comparison
ISO 16890 vs EN 779
These systems use different test methods, so there is no exact mathematical conversion. The ranges below are an indicative Eurovent comparison based on measured filters.
| EN 779:2012 | Measured ePM1 range | Measured ePM2.5 range | Measured ePM10 range |
|---|---|---|---|
| M5 | 5–35% | 10–45% | 40–70% |
| M6 | 10–40% | 20–50% | 60–80% |
| F7 | 40–65% | 65–75% | 80–90% |
| F8 | 65–90% | 75–95% | 90–100% |
| F9 | 80–90% | 85–95% | 90–100% |
EN 1822 high-efficiency filters
EPA, HEPA & ULPA classes
| Class | Group | Minimum integral efficiency | Maximum integral penetration |
|---|---|---|---|
| E10 | EPA | 85% | 15% |
| E11 | EPA | 95% | 5% |
| E12 | EPA | 99.5% | 0.5% |
| H13 | HEPA | 99.95% | 0.05% |
| H14 | HEPA | 99.995% | 0.005% |
| U15 | ULPA | 99.9995% | 0.0005% |
| U16 | ULPA | 99.99995% | 0.00005% |
| U17 | ULPA | 99.999995% | 0.000005% |
MPPS means most penetrating particle size. ISO 16890 covers general ventilation filters up to 99% ePM1; EPA/HEPA/ULPA filters use other standards and test methods.
Thread identification
Wire connections
Dimensions of threads using outside or inside diameter
Measure the outside diameter of a male thread or the inside diameter of a female thread, then compare it with the tables below. Values are in millimetres unless stated otherwise.
Thread dimensions can overlap. Confirm pitch or threads per inch as well as diameter before selecting a connection.
Outside thread — measured OD
| Diameter | Pitch (mm) | TPI | Metric | BSP | NPT | UNF / JIC / SAE |
|---|---|---|---|---|---|---|
| 9.728 | — | 28 | — | 1/8 | — | — |
| 10 | 1 | — | M10x1 | — | — | — |
| 10 | 1.5 | — | M10x1.5 | — | — | — |
| 10.287 | — | 27 | — | — | 1/8 | — |
| 11.113 | — | 20 | — | — | — | 7/16-20 |
| 12 | 1.5 | — | M12x1.5 | — | — | — |
| 12.7 | — | 20 | — | — | — | 1/2-20 |
| 13.157 | — | 19 | — | 1/4 | — | — |
| 13.718 | — | 18 | — | — | 1/4 | — |
| 14 | 1.5 | — | M14x1.5 | — | — | — |
| 14.288 | — | 18 | — | — | — | 9/16-18 |
| 15.875 | — | 18 | — | — | — | 5/8-18 |
| 16 | 1.5 | — | M16x1.5 | — | — | — |
| 16.662 | — | 19 | — | 3/8 | — | — |
| 17.145 | — | 18 | — | — | 3/8 | — |
| 18 | 1.5 | — | M18x1.5 | — | — | — |
| 19.05 | — | 16 | — | — | — | 3/4-16 |
| 20 | 1.5 | — | M20x1.5 | — | — | — |
| 20.955 | — | 14 | — | 1/2 | — | — |
| 21.336 | — | 14 | — | — | 1/2 | — |
| 22 | 1.5 | — | M22x1.5 | — | — | — |
| 22.225 | — | 14 | — | — | — | 7/8-14 |
| 22.911 | — | 14 | — | 5/8 | — | — |
| 24 | 1.5 | — | M24x1.5 | — | — | — |
| 26 | 1.5 | — | M26x1.5 | — | — | — |
| 26.441 | — | 14 | — | 3/4 | — | — |
| 26.67 | — | 14 | — | — | 3/4 | — |
| 26.988 | — | 14 | — | — | — | 1 1/16-14 |
| 26.988 | — | 12 | — | — | — | 1 1/16-12 |
| 27 | 2 | — | M27x2 | — | — | — |
| 30 | 1.5 | — | M30x1.5 | — | — | — |
| 30 | 2 | — | M30x2 | — | — | — |
| 30.163 | — | 12 | — | — | — | 1 3/16-12 |
| 33 | 2 | — | M33x2 | — | — | — |
| 33.249 | — | 11 | — | 1 | — | — |
| 33.338 | — | 12 | — | — | — | 1 5/16-12 |
| 33.401 | — | 11 1/2 | — | — | 1 | — |
| 36 | 2 | — | M36x2 | — | — | — |
| 38 | 1.5 | — | M38x1.5 | — | — | — |
| 41.275 | — | 12 | — | — | — | 1 5/8-12 |
| 41.91 | — | 11 | — | 1 1/4 | — | — |
| 42 | 2 | — | M42x2 | — | — | — |
| 42.164 | — | 11 1/2 | — | — | 1 1/4 | — |
| 45 | 1.5 | — | M45x1.5 | — | — | — |
| 45 | 2 | — | M45x2 | — | — | — |
| 47.625 | — | 12 | — | — | — | 1 7/8-12 |
| 47.803 | — | 11 | — | 1 1/2 | — | — |
| 48 | 2 | — | M48x2 | — | — | — |
| 48.26 | — | 11 1/2 | — | — | 1 1/2 | — |
| 52 | 2 | — | M52x2 | — | — | — |
| 52 | 1.5 | — | M52x1.5 | — | — | — |
| 53.746 | — | 11 | — | 1 3/4 | — | — |
| 59.614 | — | 11 | — | 2 | — | — |
| 60.325 | — | 11 1/2 | — | — | 2 | — |
| 63.5 | — | 12 | — | — | — | 2 1/2-12 |
| 65 | 2 | — | M65x2 | — | — | — |
Inside thread — measured ID
| Diameter | Pitch (mm) | TPI | Metric | BSP | NPT | UNF / JIC / SAE |
|---|---|---|---|---|---|---|
| 8.565 | — | 28 | — | 1/8 | — | — |
| 8.674 | — | 27 | — | — | 1/8 | — |
| 8.701 | 1 | — | M10x1 | — | — | — |
| 9.025 | 1.5 | — | M10x1.5 | — | — | — |
| 9.738 | — | 20 | — | — | — | 7/16-20 |
| 10.052 | 1.5 | — | M12x1.5 | — | — | — |
| 11.265 | — | 18 | — | — | 1/4 | — |
| 11.326 | — | 20 | — | — | — | 1/2-20 |
| 11.445 | — | 19 | — | 1/4 | — | — |
| 12.052 | 1.5 | — | M14x1.5 | — | — | — |
| 12.761 | — | 18 | — | — | — | 9/16-18 |
| 14.052 | 1.5 | — | M16x1.5 | — | — | — |
| 14.348 | — | 18 | — | — | — | — |
| 14.704 | — | 18 | — | — | 3/8 | — |
| 14.950 | — | 19 | — | 3/8 | — | — |
| 16.052 | 1.5 | — | M18x1.5 | — | — | — |
| 17.330 | — | 16 | — | — | — | 3/4-16 |
| 18.052 | 1.5 | — | M20x1.5 | — | — | — |
| 18.161 | — | 14 | — | — | 1/2 | — |
| 18.633 | — | 14 | — | 1/2 | — | — |
| 20.052 | 1.5 | — | M22x1.5 | — | — | — |
| 20.262 | — | 14 | — | — | — | 7/8-14 |
| 20.589 | — | 14 | — | 5/8 | — | — |
| 22.052 | 1.5 | — | M24x1.5 | — | — | — |
| 23.508 | — | 14 | — | — | 3/4 | — |
| 24.052 | 1.5 | — | M26x1.5 | — | — | — |
| 24.120 | — | 14 | — | 3/4 | — | — |
| 24.402 | 2 | — | M27x2 | — | — | — |
| 24.696 | — | 14 | — | — | — | 1 1/16-14 |
| 24.696 | — | 12 | — | — | — | 1 1/16-12 |
| 27.402 | 2 | — | M30x2 | — | — | — |
| 27.871 | — | 12 | — | — | — | 13/16-12 |
| 28.052 | 1.5 | — | M30x1.5 | — | — | — |
| 29.517 | — | 11 1/2 | — | — | 1 | — |
| 30.292 | — | 11 | — | 1 | — | — |
| 30.402 | 2 | — | M33x2 | — | — | — |
| 31.046 | — | 12 | — | — | — | 1 5/16-12 |
| 33.402 | 2 | — | M36x2 | — | — | — |
| 36.052 | 1.5 | — | M38x1.5 | — | — | — |
| 38.252 | — | 11 1/2 | — | — | 1 1/4 | — |
| 38.953 | — | 11 | — | 1 1/4 | — | — |
| 38.984 | — | 12 | — | — | — | 1 5/8-12 |
| 39.402 | 2 | — | M42x2 | — | — | — |
| 42.402 | 2 | — | M45x2 | — | — | — |
| 43.052 | 1.5 | — | M45x1.5 | — | — | — |
| 44.323 | — | 11 1/2 | — | — | 1 1/2 | — |
| 44.846 | — | 11 | — | 1 1/2 | — | — |
| 45.334 | — | 12 | — | — | — | 1 7/8-12 |
| 45.402 | 2 | — | M48x2 | — | — | — |
| 49.402 | 2 | — | M52 x2 | — | — | — |
| 50.052 | 1.5 | — | M52x1.5 | — | — | — |
| 50.790 | — | 11 | — | 1 3/4 | — | — |
| 56.363 | — | 11 1/2 | — | — | 2 | — |
| 56.657 | — | 11 | — | 2 | — | — |
| 61.209 | — | 12 | — | — | — | 2 1/2-12 |
| 62.402 | 2 | — | M65x2 | — | — | — |
Metric flange reference
Flange dimensions DIN
- A
- Flange outside diameter
- D1
- Bolt-circle diameter
- D2
- Raised-face diameter
- n × d
- Number of bolt holes × hole diameter
Scroll horizontally to compare all pressure classes. A dash means that the source table provides no value for that DN/class combination.
| DN | Dimension | PN 6 | PN 10 | PN 16 | PN 25 | PN 40 | PN 64 | PN 100 | PN 160 | PN 250 | PN 320 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 10 | A | 75 | 90 | 90 | 90 | 90 | 100 | 100 | 100 | 125 | 125 |
| D1 | 50 | 60 | 60 | 60 | 60 | 70 | 70 | 70 | 85 | 85 | |
| D2 | 35 | 40 | 40 | 40 | 40 | 40 | 40 | 40 | 40 | 40 | |
| n x d | 4 x 11 | 4 x 14 | 4 x 14 | 4 x 14 | 4 x 14 | 4 x 14 | 4 x 14 | 4 x 14 | 4 x 18 | 4 x 18 | |
| 15 | A | 80 | 95 | 95 | 95 | 95 | 105 | 105 | 105 | 130 | 130 |
| D1 | 55 | 65 | 65 | 65 | 65 | 75 | 75 | 75 | 90 | 90 | |
| D2 | 40 | 45 | 45 | 45 | 45 | 45 | 45 | 45 | 45 | 45 | |
| n x d | 4 x 11 | 4 x 14 | 4 x 14 | 4 x 14 | 4 x 14 | 4 x 14 | 4 x 14 | 4 x 14 | 4 x 18 | 4 x 18 | |
| 20 | A | 90 | 105 | 105 | 105 | 105 | — | — | — | — | — |
| D1 | 65 | 75 | 75 | 75 | 75 | — | — | — | — | — | |
| D2 | 50 | 58 | 58 | 58 | 58 | — | — | — | — | — | |
| n x d | 4 x 11 | 4 x 14 | 4 x 14 | 4 x 14 | 4 x 14 | — | — | — | — | — | |
| 25 | A | 100 | 115 | 115 | 115 | 115 | 140 | 140 | 140 | 150 | 160 |
| D1 | 75 | 85 | 85 | 85 | 85 | 100 | 100 | 100 | 105 | 115 | |
| D2 | 60 | 68 | 68 | 68 | 68 | 68 | 68 | 68 | 68 | 68 | |
| n x d | 4 x 11 | 4 x 14 | 4 x 14 | 4 x 14 | 4 x 14 | 4 x 18 | 4 x 18 | 4 x 18 | 4 x 22 | 4 x 22 | |
| 32 | A | 120 | 140 | 140 | 140 | 140 | — | — | — | — | — |
| D1 | 90 | 100 | 100 | 100 | 100 | — | — | — | — | — | |
| D2 | 70 | 78 | 78 | 78 | 78 | — | — | — | — | — | |
| n x d | 4 x 14 | 4 x 18 | 4 x 18 | 4 x 18 | 4 x 18 | — | — | — | — | — | |
| 40 | A | 130 | 150 | 150 | 150 | 150 | 170 | 170 | 170 | 185 | 195 |
| D1 | 100 | 110 | 110 | 110 | 110 | 125 | 125 | 125 | 135 | 145 | |
| D2 | 80 | 88 | 88 | 88 | 88 | 88 | 88 | 88 | 88 | 88 | |
| n x d | 4 x 14 | 4 x 18 | 4 x 18 | 4 x 18 | 4 x 18 | 4 x 22 | 4 x 22 | 4 x 22 | 4 x 26 | 4 x 26 | |
| 50 | A | 140 | 165 | 165 | 165 | 165 | 180 | 195 | 195 | 200 | 210 |
| D1 | 110 | 125 | 125 | 125 | 125 | 135 | 145 | 145 | 150 | 160 | |
| D2 | 90 | 102 | 102 | 102 | 102 | 102 | 102 | 102 | 102 | 102 | |
| n x d | 4 x 14 | 4 x 18 | 4 x 18 | 4 x 18 | 4 x 18 | 4 x 22 | 4 x 26 | 4 x 26 | 8 x 26 | 8 x 26 | |
| 65 | A | 160 | 185 | 185 | 185 | 185 | 205 | 220 | 220 | 230 | 255 |
| D1 | 130 | 145 | 145 | 145 | 145 | 160 | 170 | 170 | 180 | 200 | |
| D2 | 110 | 122 | 122 | 122 | 122 | 122 | 122 | 122 | 122 | 122 | |
| n x d | 4 x 14 | 4 x 18 | 4 x 18 | 8 x 18 | 8 x 18 | 8 x 22 | 8 x 26 | 8 x 26 | 8 x 26 | 8 x 30 | |
| 80 | A | 190 | 200 | 200 | 200 | 200 | 215 | 230 | 230 | 255 | 275 |
| D1 | 150 | 160 | 160 | 160 | 160 | 170 | 180 | 180 | 200 | 220 | |
| D2 | 128 | 138 | 138 | 138 | 138 | 138 | 138 | 138 | 138 | 138 | |
| n x d | 4 x 18 | 8 x 18 | 8 x 18 | 8 x 18 | 8 x 18 | 8 x 22 | 8 x 26 | 8 x 26 | 8 x 30 | 8 x 30 | |
| 100 | A | 210 | 220 | 220 | 235 | 235 | 250 | 265 | 265 | 300 | 335 |
| D1 | 170 | 180 | 180 | 190 | 190 | 200 | 210 | 210 | 235 | 265 | |
| D2 | 148 | 158 | 158 | 162 | 162 | 162 | 162 | 162 | 162 | 162 | |
| n x d | 4 x 18 | 8 x 18 | 8 x 18 | 8 x 22 | 8 x 22 | 8 x 26 | 8 x 30 | 8 x 30 | 8 x 33 | 8 x 36 | |
| 125 | A | 240 | 250 | 250 | 270 | 270 | 295 | 315 | 315 | 340 | 380 |
| D1 | 200 | 210 | 210 | 220 | 220 | 240 | 250 | 250 | 275 | 310 | |
| D2 | 178 | 188 | 188 | 188 | 188 | 188 | 188 | 188 | 188 | 188 | |
| n x d | 8 x 18 | 8 x 18 | 8 x 18 | 8 x 26 | 8 x 26 | 8 x 30 | 8 x 33 | 8 x 33 | 12 x 33 | 12 x 36 | |
| 150 | A | 265 | 285 | 285 | 300 | 300 | 345 | 355 | 355 | 390 | 425 |
| D1 | 225 | 240 | 240 | 250 | 250 | 280 | 290 | 290 | 320 | 350 | |
| D2 | 202 | 212 | 212 | 218 | 218 | 218 | 218 | 218 | 218 | 218 | |
| n x d | 8 x 18 | 8 x 22 | 8 x 22 | 8 x 26 | 8 x 26 | 8 x 33 | 12 x 33 | 12 x 33 | 12 x 36 | 12 x 39 | |
| 175 | A | — | 315 | 315 | 330 | 350 | 375 | 385 | 390 | 430 | 485 |
| D1 | — | 270 | 270 | 280 | 295 | 310 | 320 | 320 | 355 | 400 | |
| D2 | — | 242 | 242 | 248 | 260 | 260 | 260 | 260 | 260 | 260 | |
| n x d | — | 8 x 22 | 8 x 22 | 12 x 26 | 12 x 30 | 12 x 33 | 12 x 33 | 12 x 36 | 12 x 39 | 12 x 42 | |
| 200 | A | 320 | 340 | 340 | 360 | 375 | 415 | 430 | 430 | 485 | 525 |
| D1 | 280 | 295 | 295 | 310 | 320 | 345 | 360 | 360 | 400 | 440 | |
| D2 | 258 | 268 | 268 | 278 | 285 | 285 | 285 | 285 | 285 | 285 | |
| n x d | 8 x 18 | 8 x 22 | 12 x 22 | 12 x 26 | 12 x 30 | 12 x 36 | 12 x 36 | 12 x 36 | 12 x 42 | 16 x 42 | |
| 250 | A | 375 | 395 | 405 | 425 | 450 | 470 | 505 | 515 | 585 | 640 |
| D1 | 335 | 350 | 355 | 370 | 385 | 400 | 430 | 430 | 490 | 540 | |
| D2 | 312 | 320 | 320 | 335 | 345 | 345 | 345 | 345 | 345 | 345 | |
| n x d | 12 x 18 | 12 x 22 | 12 x 26 | 12 x 30 | 12 x 33 | 12 x 36 | 12 x 39 | 12 x 42 | 16 x 48 | 16 x 52 | |
| 300 | A | 440 | 445 | 460 | 485 | 515 | 530 | 585 | 585 | 690 | — |
| D1 | 395 | 400 | 410 | 430 | 450 | 460 | 500 | 500 | 590 | — | |
| D2 | 365 | 370 | 378 | 395 | 410 | 410 | 410 | 410 | 410 | — | |
| n x d | 12 x 22 | 12 x 22 | 12 x 26 | 16 x 30 | 16 x 33 | 16 x 36 | 16 x 42 | 16 x 42 | 16 x 52 | — | |
| 350 | A | 490 | 505 | 520 | 555 | 580 | 600 | 655 | — | — | — |
| D1 | 445 | 460 | 470 | 490 | 510 | 525 | 560 | — | — | — | |
| D2 | 415 | 430 | 438 | 450 | 465 | 465 | 465 | — | — | — | |
| n x d | 12 x 22 | 16 x 22 | 16 x 26 | 16 x 33 | 16 x 36 | 16 x 39 | 16 x 48 | — | — | — | |
| 400 | A | 540 | 565 | 580 | 620 | 660 | 670 | 715 | — | — | — |
| D1 | 495 | 515 | 525 | 550 | 585 | 585 | 620 | — | — | — | |
| D2 | 465 | 482 | 490 | 505 | 535 | 535 | 535 | — | — | — | |
| n x d | 16 x 22 | 16 x 26 | 16 x 30 | 16 x 36 | 16 x 39 | 16 x 42 | 16 x 48 | — | — | — | |
| 450 | A | 595 | 615 | 640 | — | 685 | — | — | — | — | — |
| D1 | 550 | 565 | 585 | — | 610 | — | — | — | — | — | |
| D2 | 520 | 532 | 550 | — | 560 | — | — | — | — | — | |
| n x d | 16 x 22 | 20 x 26 | 20 x 30 | — | 20 x 39 | — | — | — | — | — | |
| 500 | A | 645 | 670 | 715 | 730 | 755 | 800 | 870 | — | — | — |
| D1 | 600 | 620 | 650 | 660 | 670 | 705 | 760 | — | — | — | |
| D2 | 570 | 585 | 610 | 615 | 615 | 615 | 615 | — | — | — | |
| n x d | 20 x 22 | 20 x 26 | 20 x 33 | 20 x 36 | 20 x 42 | 20 x 48 | 20 x 56 | — | — | — | |
| 600 | A | 755 | 780 | 840 | 845 | 890 | 930 | 990 | — | — | — |
| D1 | 705 | 725 | 770 | 770 | 795 | 820 | 875 | — | — | — | |
| D2 | 670 | 685 | 725 | 720 | 735 | 735 | 735 | — | — | — | |
| n x d | 20 x 26 | 20 x 30 | 20 x 36 | 20 x 39 | 20 x 48 | 20 x 56 | 20 x 62 | — | — | — | |
| 700 | A | 860 | 895 | 910 | 960 | 995 | 1045 | 1145 | — | — | — |
| D1 | 810 | 840 | 840 | 875 | 900 | 935 | 1020 | — | — | — | |
| D2 | 775 | 800 | 795 | 820 | 840 | 840 | 840 | — | — | — | |
| n x d | 24 x 26 | 24 x 30 | 24 x 36 | 24 x 42 | 24 x 48 | 24 x 56 | 24 x 70 | — | — | — | |
| 800 | A | 975 | 1015 | 1025 | 1085 | 1140 | 1165 | — | — | — | — |
| D1 | 920 | 950 | 950 | 990 | 1030 | 1050 | — | — | — | — | |
| D2 | 880 | 905 | 900 | 930 | 960 | 960 | — | — | — | — | |
| n x d | 24 x 30 | 24 x 33 | 24 x 39 | 24 x 48 | 24 x 56 | 24 x 62 | — | — | — | — | |
| 900 | A | 1075 | 1115 | 1125 | 1185 | 1250 | 1285 | — | — | — | — |
| D1 | 1020 | 1050 | 1050 | 1090 | 1140 | 1170 | — | — | — | — | |
| D2 | 980 | 1005 | 1000 | 1030 | 1070 | 1070 | — | — | — | — | |
| n x d | 24 x 30 | 28 x 33 | 28 x 39 | 28 x 48 | 28 x 56 | 28 x 62 | — | — | — | — |
Imperial flange reference
Flange dimensions ASME
- A
- Flange outside diameter
- b
- Flange thickness
- D1
- Bolt-circle diameter
- D2
- Raised-face diameter
- n
- Number of bolt holes
- d
- Bolt-hole diameter
Each pressure class has an inch column followed by its millimetre equivalent. A dash means that the source table provides no value.
| DN | Dimension | 125/150 lbs | 300 lbs | 600 lbs | 900 lbs | 1500 lbs | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| inch | mm | inch | mm | inch | mm | inch | mm | inch | mm | ||
| 3" | A | 7 1/2 | 190.5 | 8 1/4 | 209.6 | 8 1/4 | 209.6 | 9 1/2 | 241 | 10 1/2 | 267 |
| b | 15/16 | 23.8 | 1 1/8 | 28.6 | 1 1/4 | 31.8 | 1 1/2 | 38.1 | 1 7/8 | 47.6 | |
| D2 | 5 | 127 | 5 | 127 | 5 | 127 | 5 | 127 | 5 | 127 | |
| D1 | 6 | 152.4 | 6 5/8 | 168.3 | 6 5/8 | 168.3 | 7 1/2 | 190.5 | 8 | 203 | |
| n | 4 | 4 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | |
| d | 3/4 | 19 | 7/8 | 22.2 | 7/8 | 22.2 | 1 | 25.4 | 1 1/4 | 31.8 | |
| 3 1/2" | A | 8 1/2 | 215.9 | 9 | 228.6 | 9 | 228.6 | — | — | — | — |
| b | 15/16 | 23.8 | 1 3/16 | 30.2 | 1 3/8 | 34.9 | — | — | — | — | |
| D2 | 5 1/2 | 139.7 | 5 1/2 | 139.7 | 5 1/2 | 139.7 | — | — | — | — | |
| D1 | 7 | 177.8 | 7 1/4 | 184.2 | 7 1/4 | 184.2 | — | — | — | — | |
| n | 8 | 8 | 8 | 8 | 8 | 8 | — | — | — | — | |
| d | 3/4 | 19 | 7/8 | 22.2 | 1 | 25.4 | — | — | — | — | |
| 4" | A | 9 | 228.6 | 10 | 254 | 10 3/4 | 273 | 11 1/2 | 292 | 12 1/4 | 311 |
| b | 15/16 | 23.8 | 1 1/4 | 31.7 | 1 1/2 | 38.1 | 1 3/4 | 44.4 | 2 1/8 | 54 | |
| D2 | 6 3/16 | 157.2 | 6 3/16 | 157.2 | 6 3/16 | 157.2 | 6 3/16 | 157.2 | 6 3/16 | 157.2 | |
| D1 | 7 1/2 | 190 | 7 7/8 | 200 | 8 1/2 | 215.9 | 9 1/4 | 235 | 9 1/2 | 241 | |
| n | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | |
| d | 3/4 | 19 | 7/8 | 22.2 | 1 | 25.4 | 1 1/4 | 31.8 | 1 3/8 | 34.9 | |
| 5" | A | 10 | 254 | 11 | 279.4 | 13 | 330.2 | 13 3/4 | 349 | 14 3/4 | 375 |
| b | 15/16 | 23.8 | 1 3/8 | 34.9 | 1 3/4 | 44.4 | 2 | 50.8 | 2 7/8 | 73 | |
| D2 | 7 5/16 | 185.7 | 7 5/16 | 185.7 | 7 5/16 | 185.7 | 7 5/16 | 185.7 | 7 5/16 | 185.7 | |
| D1 | 8 1/2 | 215.9 | 9 1/4 | 234.9 | 10 1/2 | 266.7 | 11 | 279 | 11 1/2 | 292 | |
| n | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | |
| d | 7/8 | 22.2 | 7/8 | 22.2 | 1 1/8 | 28.6 | 1 3/8 | 34.9 | 1 5/8 | 41.3 | |
| 6" | A | 11 | 279 | 12 1/2 | 317.5 | 14 | 355.6 | 15 | 381 | 15 1/2 | 394 |
| b | 1 | 25.4 | 1 7/16 | 36.5 | 1 7/8 | 47.6 | 2 3/16 | 55.6 | 3 1/4 | 82.6 | |
| D2 | 8 1/2 | 215.9 | 8 1/2 | 215.9 | 8 1/2 | 215.9 | 8 1/2 | 215.9 | 8 1/2 | 215.9 | |
| D1 | 9 1/2 | 241 | 10 5/8 | 269.9 | 11 1/2 | 292.1 | 12 1/2 | 318 | 12 1/2 | 318 | |
| n | 8 | 8 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | |
| d | 7/8 | 22.2 | 7/8 | 22.2 | 1 1/8 | 28.6 | 1 1/4 | 31.8 | 1 1/2 | 38.1 | |
| 8" | A | 13 1/2 | 342.9 | 15 | 381 | 16 1/2 | 419 | 18 1/2 | 470 | 19 | 482.6 |
| b | 1 1/8 | 28.6 | 1 5/8 | 41.3 | 2 3/16 | 55.6 | 2 1/2 | 63.5 | 3 5/8 | 92.1 | |
| D2 | 10 5/8 | 269.9 | 10 5/8 | 269.9 | 10 5/8 | 269.9 | 10 5/8 | 269.9 | 10 5/8 | 269.9 | |
| D1 | 11 3/4 | 298.4 | 13 | 330.2 | 13 3/4 | 349.2 | 15 1/2 | 394.2 | 15 1/2 | 394.2 | |
| n | 8 | 8 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | |
| d | 7/8 | 22.2 | 1 | 25.4 | 1 1/4 | 31.8 | 1 1/2 | 38.1 | 1 3/4 | 44.5 | |
| 10" | A | 16 | 406.4 | 17 1/2 | 444.5 | 20 | 508 | 21 1/2 | 546 | 23 | 584 |
| b | 1 3/16 | 30.2 | 1 7/8 | 47.6 | 2 1/2 | 63.5 | 2 3/4 | 69.8 | 4 1/4 | 108 | |
| D2 | 12 3/4 | 323.8 | 12 3/4 | 323.8 | 12 3/4 | 323.8 | 12 3/4 | 323.8 | 12 3/4 | 323.9 | |
| D1 | 14 1/4 | 361.9 | 15 1/4 | 387.4 | 17 | 431.8 | 18 1/2 | 470 | 19 | 482.6 | |
| n | 12 | 12 | 16 | 16 | 16 | 16 | 16 | 16 | 12 | 12 | |
| d | 1 | 25.4 | 1 1/8 | 28.6 | 1 3/8 | 34.9 | 1 1/2 | 38.1 | 2 | 50.8 | |
| 12" | A | 19 | 482.6 | 20 1/2 | 520.7 | 22 | 558.8 | 24 | 610 | 26 1/2 | 673 |
| b | 1 1/4 | 31.7 | 2 | 50.8 | 2 5/8 | 66.7 | 3 1/8 | 79.4 | 4 7/8 | 124 | |
| D2 | 15 | 381 | 15 | 381 | 15 | 381 | 15 | 381 | 15 | 381 | |
| D1 | 17 | 431.8 | 17 3/4 | 450.9 | 19 1/4 | 488.9 | 21 | 533.4 | 22 1/2 | 571.5 | |
| n | 12 | 12 | 16 | 16 | 20 | 20 | 20 | 20 | 16 | 16 | |
| d | 1 | 25.4 | 1 1/4 | 31.8 | 1 3/8 | 34.9 | 1 1/2 | 38.1 | 2 1/8 | 54 | |
| 14" | A | 21 | 533.4 | 23 | 584 | 23 3/4 | 603 | 25 1/4 | 641 | 29 1/2 | 749 |
| b | 1 3/8 | 34.9 | 2 1/8 | 54 | 2 3/4 | 69.8 | 3 3/8 | 85.7 | 5 1/4 | 133 | |
| D2 | 16 1/4 | 412.7 | 16 1/4 | 412.7 | 16 1/4 | 412.7 | 16 1/4 | 412.7 | 16 1/4 | 412.7 | |
| D1 | 18 3/4 | 476.2 | 20 1/4 | 514.4 | 20 3/4 | 527 | 22 | 558.8 | 25 | 635 | |
| n | 12 | 12 | 20 | 20 | 20 | 20 | 20 | 20 | 16 | 16 | |
| d | 1 1/8 | 28.6 | 1 1/4 | 31.8 | 1 1/2 | 38.1 | 1 5/8 | 41.3 | 2 3/8 | 60.3 | |
| 16" | A | 23 1/2 | 596.9 | 25 1/2 | 647.7 | 27 | 686 | 27 3/4 | 705 | 32 1/2 | 826 |
| b | 1 7/16 | 36.5 | 2 1/4 | 57.2 | 3 | 76.2 | 3 1/2 | 88.9 | 5 3/4 | 146 | |
| D2 | 18 1/2 | 470 | 18 1/2 | 470 | 18 1/2 | 470 | 18 1/2 | 470 | 18 1/2 | 470 | |
| D1 | 21 1/4 | 539.8 | 22 1/2 | 571.5 | 23 3/4 | 603.3 | 24 1/4 | 616 | 27 3/4 | 705 | |
| n | 16 | 16 | 20 | 20 | 20 | 20 | 20 | 20 | 16 | 16 | |
| d | 1 1/8 | 28.6 | 1 3/8 | 34.9 | 1 5/8 | 41.3 | 1 3/4 | 44.5 | 2 5/8 | 66.7 | |
| 18" | A | 25 | 635 | 28 | 711 | 29 1/4 | 743 | 31 | 787 | 36 | 914 |
| b | 1 9/16 | 39.7 | 2 3/8 | 60.3 | 3 1/4 | 82.6 | 4 | 102 | 6 3/8 | 162 | |
| D2 | 21 | 533.4 | 21 | 533.4 | 21 | 533.4 | 21 | 533.4 | 21 | 533.4 | |
| D1 | 22 3/4 | 577.9 | 24 3/4 | 628.7 | 25 3/4 | 654.1 | 27 | 685.8 | 30 1/2 | 775 | |
| n | 16 | 16 | 24 | 24 | 20 | 20 | 20 | 20 | 16 | 16 | |
| d | 1 1/4 | 31.8 | 1 3/8 | 34.9 | 1 3/4 | 44.5 | 2 | 50.8 | 2 7/8 | 73 | |
| 20" | A | 27 1/2 | 698.5 | 30 1/2 | 774.7 | 32 | 813 | 33 3/4 | 857 | 38 3/4 | 984 |
| b | 1 1/16 | 42.9 | 2 1/2 | 63.5 | 3 1/2 | 88.9 | 4 1/4 | 108 | 7 | 178 | |
| D2 | 23 | 584.2 | 23 | 584.2 | 23 | 584.2 | 23 | 584.2 | 23 | 584.2 | |
| D1 | 25 | 635 | 27 | 685.8 | 28 1/2 | 724 | 29 1/2 | 749.3 | 32 3/4 | 832 | |
| n | 20 | 20 | 24 | 24 | 24 | 24 | 20 | 20 | 16 | 16 | |
| d | 1 1/4 | 31.8 | 1 3/8 | 34.9 | 1 3/4 | 44.5 | 2 1/8 | 54 | 3 1/8 | 79.4 | |
| 24" | A | 32 | 812.8 | 36 | 914 | 37 | 940 | 41 | 1041 | 46 | 1168 |
| b | 1 7/8 | 47.6 | 2 3/4 | 69.8 | 4 | 102 | 5 1/2 | 140 | 8 | 203 | |
| D2 | 24 1/4 | 692.2 | 27 1/4 | 692.2 | 27 1/4 | 692.2 | 27 1/4 | 692.2 | 27 1/4 | 692.2 | |
| D1 | 29 1/2 | 749.3 | 32 | 812.8 | 33 | 838.2 | 35 1/2 | 902 | 39 | 991 | |
| n | 20 | 20 | 24 | 24 | 24 | 24 | 20 | 20 | 16 | 16 | |
| d | 1 3/8 | 34.9 | 1 5/8 | 41.3 | 2 | 50.8 | 2 5/8 | 66.7 | 3 5/8 | 92.1 | |