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Standards and Sizes
The standard tripod screw size for cameras and accessories is commonly known as the 1/4"-20 thread. This means that the screw has a diameter of 1/4 inch and a pitch of 20 threads per inch.
Conversions
Length (Distance)
- Inches(in) x 25.4 = Millimeters x 0.0394 = Inches (in)
- Feet (ft) x 0.305 = Meters (m) x 3.281 = Feet
- Miles x 1.609 = Kilometers (km) x 0.621 = Miles
Base quantity | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 10 | 50 | 100 |
Miles in x km * | 0.621371 | 1.242742 | 1.864113 | 2.485484 | 3.106855 | 3.728226 | 4.349597 | 6.21371 | 31.06855 | 62.1371 |
km in x Miles * | 1.60934 | 3.21868 | 4.82802 | 6.43736 | 8.0467 | 9.65604 | 11.26538 | 16.0934 | 80.467 | 160.934 |
Yards in x Meters * | 0.9144 | 1.8288 | 2.7432 | 3.6576 | 4.572 | 5.4864 | 6.4008 | 9.144 | 45.72 | 91.44 |
Meters in x Yards * | 1.09361 | 2.18722 | 3.28083 | 4.37444 | 5.46805 | 6.56166 | 7.65527 | 10.9361 | 54.6805 | 109.361 |
Feet in x Meters * | 3.28084 | 6.56168 | 9.84252 | 13.12336 | 16.4042 | 19.68504 | 22.96588 | 32.8084 | 164.042 | 328.084 |
Meters to Feet * | 0.3048 | 0.6096 | 0.9144 | 1.2192 | 1.524 | 1.8288 | 2.1336 | 3.048 | 15.24 | 30.48 |
mm in x Inches * | 25.4 | 50.8 | 76.2 | 101.6 | 127 | 152.4 | 177.8 | 254 | 1270 | 2540 |
Inches in x mm * | 0.0393701 | 0.0787402 | 0.1181103 | 0.1574804 | 0.1968505 | 0.2362206 | 0.2755907 | 0.393701 | 1.968505 | 3.93701 |
Volume (Capacity)
- Cubic Inches (CU in) x 16.387 = Cubic Centemeters (cc) x 0.061 = Cubic Inches (CU in)
- Imperial Pints (imp Pt) x 0.568 = Litres (l) x 1.76 = Imperial Pints (imp Pt)
- Imperial Quarts (Imp qt) x 1.137 = Litres (l) x 0.88 = Imperial Quarts (Imp qt)
- Imperial Quarts (Imp qt) x 1.201 = US Quarts (US qt) x 0.833 = Imperial Quarts (Imp qt)
- US Quarts (Imp qt) x 0.946 = Litres (l) x 1.057 = US Quarts (Imp qt)
- Imperial Gallons (Imp gal) x 4.546 = Litres (l) x .22 = Imperial Gallons (Imp gal)
- Imperial Gallons (Imp gal) x 1.201 = US Gallons (US Gal) x 0.833= Imperial Gallons (Imp gal)
- US Gallons (US Gal) x 3.785 = Litres (l) x 0.264 = US Gallons (US Gal)
Mass (weight)
- Ounces (oz) x 28.35 = Grams (g) x 0.035 = Ounces (oz)
- Pounds (lb) x 0.454 = Kilograms (kg) x 2.205 = Pounds (lb)
Force
- Ounces-force (off; oz) x 0.278 = Newtons (N) x 3.6 = Ounces-force (off; oz)
- Pounds-force (lbs; lb) x 4.448 = Newtons (N) x 0.225 =0.225 = Pounds-force (lbs; lb)
- Newtons (N) x 0.1 = Kilograms-force (kgs; kg) x 9.81 = Newtons (N)
Pressure
- Pounds-force per square inch (psi; Ibf/in:; Ib/in*) x 0.070 = Kilograms-force per square centimetre (kgf/cm'; kg/cm:) x 14.223 = Pounds-force per square inch (psi; Ibf/in:; Ib/in*)
- Pounds-force per square inch (psi; Ibf/in'; Ib/in*) x 0.068 = Atmospheres (atm) x 14.696 = Pounds-force per square inch (psi; Ibf/in'; Ib/in*)
- Pounds-force per square inch (psi; Ibf/in*; Ib/in*) x 0.069 = Bars x 14.5 = Pounds-force per square inch (psi; Ibf/in*; Ib/in*)
- Pounds-force per square inch (psi; Ibf/in*; Ib/in2) x 6.895 = Kilopascals (kPa) x 0.145 = Pounds-force per square inch (psi; Ibf/in*; Ib/in*)
- Kilopascals (kPa) x 0.01 = Kilograms-force per square centimetre (kgf/cm2; kg/cm2) x98.1 = Kilopascals (kPa)
- Millibar (mbar) x 100 = Pascals (Pa) × 0.01 =0.01 = Millibar (mbar)
- Millibar (mbar) x 0.0145 = Pounds-force per square inch (psi; Ibf/in2; Ib/in2) x 68.947 = Millibar (mbar)
- Millibar (mbar) x 0.75 = Millimetres of mercury (mmHg) x 1.333 = Millibar (mbar)
- Millibar (mbar) x 0.401 = Inches of water (inH20) x2.491 = Millibar (mbar)
- Millimetres of mercury (mmHg) x 0.535 = Inches of water (inH20) x 1.868 = Millimetres of mercury (mmHg)
- Inches of water (inH2O) x 0.036 = Pounds-force per square inch (psi; Ibf/in*; Ib/in2) x27.68 = Inches of water (inH2O)
Torque (Moment of force)
- Pounds-force inches (Ibf in; Ib in) x 1.152 = Kilograms-force centimetre (kgf cm; kg cm) x 0.868 = Pounds-force inches (Ibf in; Ib in)
- Pounds-force inches (Ibf in; Ib in) x 0.113 = Newton metres (Nm) x 8.85 = Pounds-force inches (Ibf in; Ib in)
- Pounds-force inches (Ibf in; Ib in) x 0.083 = Pounds-force feet (Ibf ft; Ib ft) x 7.233 = Pounds-force inches (Ibf in; Ib in)
- Pounds-force feet (Ibf ft; Ib ft) x 1.356 = Newton metres (Nm) x 0.738 = Pounds-force feet (Ibf ft; Ib ft)
- Newton metres (Nm) x 0.102 = Kilograms-force metres (kgf m; kg m) x 9.804 = Newton metres (Nm)
Power
- Horsepower (hp) x 745.7 = Watts (W) x 0.0013 =0.0013 = Horsepower (hp)
Velocity (Speed)
- Miles per hour (miles/hr; mph) x 1.609 = Kilometres per hour (km/hr; kph) x 0.621 = Miles per hour (miles/hr; mph)
Fuel Consumption
- Miles per gallon, Imperial (mpg)× 0.354 = Kilometres per litre (km/l) x 2.825 = Miles per gallon, Imperial (mpg)
- Miles per gallon, US (mpg) × 0.425 = Kilometres per litre (km/l) x 2.352 = Miles per gallon, US (mpg)
It is common practice to convert from miles per gallon (mpg) to litres/100 kilometres (l/100km), where mpg x 1/100 km = 282
Temperature
- Degrees Fahrenheit = (°C × 1.8) + 32 Degrees Celsius (Degrees Centigrade; °C) = (°F - 32) × 0.56
Bolt sizes and Threads
BA | Thread pitch | Outside diameter | Threads density | Outside diameter | Spanner | |
---|---|---|---|---|---|---|
(mm) | (mm) | threads per inch(tpi) | (in) | (mm) | (in) | |
0 | 1.00 | 6.00 | 25.40 | 0.2362 | 10.5000 | 0.4134 |
1 | 0.90 | 5.30 | 28.22 | 0.2087 | 9.2750 | 0.3652 |
2 | 0.81 | 4.70 | 31.36 | 0.1850 | 8.2250 | 0.3238 |
3 | 0.73 | 4.10 | 34.79 | 0.1614 | 7.1750 | 0.2825 |
4 | 0.66 | 3.60 | 38.48 | 0.1417 | 6.3000 | 0.2480 |
5 | 0.59 | 3.20 | 43.05 | 0.1260 | 5.6000 | 0.2205 |
6 | 0.53 | 2.80 | 47.92 | 0.1102 | 4.9000 | 0.1929 |
7 | 0.48 | 2.50 | 52.92 | 0.0984 | 4.3750 | 0.1722 |
8 | 0.43 | 2.20 | 59.07 | 0.0866 | 3.8500 | 0.1516 |
9 | 0.39 | 1.90 | 65.13 | 0.0748 | 3.3250 | 0.1309 |
10 | 0.35 | 1.70 | 72.57 | 0.0669 | 2.9750 | 0.1171 |
⋮ | ||||||
25 | 0.072 | 0.25 | 352.78 | 0.0098 | 0.4375 | 0.0172 |
Designation | Nominal Dia (mm) | Nominal Dia (inch) | Pitch (mm) | Pitch (per inch) | Angle |
---|---|---|---|---|---|
10 BA | 1.7000 | 0.0669 | 0.3500 | 72.5700 | 47.50 |
9 BA | 1.9000 | 0.0748 | 0.3900 | 65.1300 | 47.50 |
M2 x 0.4 | 2.0000 | 0.0787 | 0.4000 | 63.5000 | 60.00 |
8 BA | 2.2000 | 0.0866 | 0.4300 | 59.0700 | 47.50 |
7 BA | 2.5000 | 0.0984 | 0.4800 | 52.9200 | 47.50 |
M2.5 x 0.45 | 2.5000 | 0.0984 | 0.4500 | 56.4444 | 60.00 |
6 BA | 2.8000 | 0.1102 | 0.5301 | 47.9200 | 47.50 |
M3 x 0.5 | 3.0000 | 0.1181 | 0.5000 | 50.8000 | 60.00 |
1/8 x 40 BSW | 3.1750 | 0.1250 | 0.6350 | 40.0000 | 55.00 |
5 BA | 3.2000 | 0.1260 | 0.5900 | 43.0500 | 47.50 |
4 BA | 3.6000 | 0.1417 | 0.6601 | 38.4800 | 47.50 |
M4 x 0.7 | 4.0000 | 0.1575 | 0.7000 | 36.2857 | 60.00 |
3 BA | 4.1000 | 0.1614 | 0.7301 | 34.7900 | 47.50 |
2 BA | 4.7000 | 0.1850 | 0.8099 | 31.3600 | 47.50 |
3/16 x 32 BSF | 4.7625 | 0.1875 | 0.7938 | 32.0000 | 55.00 |
3/16 x 24 BSW | 4.7625 | 0.1875 | 1.0583 | 24.0000 | 55.00 |
M5 x 0.8 | 5.0000 | 0.1969 | 0.8000 | 31.7500 | 60.00 |
1 BA | 5.3000 | 0.2087 | 0.9001 | 28.2200 | 47.50 |
7/32 x 28 BSF | 5.5563 | 0.2188 | 0.9071 | 28.0000 | 55.00 |
M6 x 1 | 6.0000 | 0.2362 | 1.0000 | 25.4000 | 60.00 |
0 BA | 6.0000 | 0.2362 | 1.0000 | 25.4000 | 47.50 |
1/4 x 28 UNF | 6.3500 | 0.2500 | 0.9071 | 28.0000 | 60.00 |
1/4 x 26 BSF | 6.3500 | 0.2500 | 0.9769 | 26.0000 | 55.00 |
1/4 x 20 UNC | 6.3500 | 0.2500 | 1.2700 | 20.0000 | 60.00 |
1/4 x 20 BSW | 6.3500 | 0.2500 | 1.2700 | 20.0000 | 55.00 |
M7 x 1 | 7.0000 | 0.2756 | 1.0000 | 25.4000 | 60.00 |
9/32 x 26 BSF | 7.1438 | 0.2813 | 0.9769 | 26.0000 | 55.00 |
5/16 x 24 UNF | 7.9375 | 0.3125 | 1.0583 | 24.0000 | 60.00 |
5/16 x 22 BSF | 7.9375 | 0.3125 | 1.1545 | 22.0000 | 55.00 |
5/16 x 18 UNC | 7.9375 | 0.3125 | 1.4111 | 18.0000 | 60.00 |
5/16 x 18 BSW | 7.9375 | 0.3125 | 1.4111 | 18.0000 | 55.00 |
M8 x 1 (Fine) | 8.0000 | 0.3150 | 1.0000 | 25.4000 | 60.00 |
M8 x 1.25 | 8.0000 | 0.3150 | 1.2500 | 20.3200 | 60.00 |
3/8 x 24 UNF | 9.5250 | 0.3750 | 1.0583 | 24.0000 | 60.00 |
3/8 x 20 BSF | 9.5250 | 0.3750 | 1.2700 | 20.0000 | 55.00 |
3/8 x 16 UNC | 9.5250 | 0.3750 | 1.5875 | 16.0000 | 60.00 |
3/8 x 16 BSW | 9.5250 | 0.3750 | 1.5875 | 16.0000 | 55.00 |
M10 x 1 (Super Fine) | 10.0000 | 0.3937 | 1.0000 | 25.4000 | 60.00 |
M10 x 1.25 (Fine) | 10.0000 | 0.3937 | 1.2500 | 20.3200 | 60.00 |
M10 x 1.5 | 10.0000 | 0.3937 | 1.5000 | 16.9333 | 60.00 |
7/16 x 20 UNF | 11.1125 | 0.4375 | 1.2700 | 20.0000 | 60.00 |
7/16 x 18 BSF | 11.1125 | 0.4375 | 1.4111 | 18.0000 | 55.00 |
7/16 x 14 UNC | 11.1125 | 0.4375 | 1.8143 | 14.0000 | 60.00 |
7/16 x 14 BSW | 11.1125 | 0.4375 | 1.8143 | 14.0000 | 55.00 |
M12 x 1.25 (Super Fine) | 12.0000 | 0.4724 | 1.2500 | 20.3200 | 60.00 |
M12 x 1.5 (Fine) | 12.0000 | 0.4724 | 1.5000 | 16.9333 | 60.00 |
M12 x 1.75 | 12.0000 | 0.4724 | 1.7500 | 14.5143 | 60.00 |
1/2 x 20 UNF | 12.7000 | 0.5000 | 1.2700 | 20.0000 | 60.00 |
1/2 x 16 BSF | 12.7000 | 0.5000 | 1.5875 | 16.0000 | 55.00 |
1/2 x 13 UNC | 12.7000 | 0.5000 | 1.9538 | 13.0000 | 60.00 |
1/2 x 12 BSW | 12.7000 | 0.5000 | 2.1167 | 12.0000 | 55.00 |
M14 x 1.5 (Fine) | 14.0000 | 0.5512 | 1.5000 | 16.9333 | 60.00 |
M14 x 2 | 14.0000 | 0.5512 | 2.0000 | 12.7000 | 60.00 |
9/16 x 18 UNF | 14.2875 | 0.5625 | 1.4111 | 18.0000 | 60.00 |
9/16 x 16 BSF | 14.2875 | 0.5625 | 1.5875 | 16.0000 | 55.00 |
9/16 x 12 UNC | 14.3002 | 0.5630 | 2.1167 | 12.0000 | 60.00 |
9/16 x 12 BSW | 14.2875 | 0.5625 | 2.1167 | 12.0000 | 55.00 |
5/8 x 18 UNF | 15.8750 | 0.6250 | 1.4111 | 18.0000 | 60.00 |
5/8 x 14 BSF | 15.8750 | 0.6250 | 1.8143 | 14.0000 | 60.00 |
5/8 x 11 UNC | 15.8750 | 0.6250 | 2.3091 | 11.0000 | 55.00 |
5/8 x 11 BSW | 15.8750 | 0.6250 | 2.3091 | 11.0000 | 55.00 |
M16 x 1.5 (JIS) | 16.0000 | 0.6299 | 1.5000 | 16.9333 | 60.00 |
M16 x 2 | 16.0000 | 0.6299 | 2.0000 | 12.7000 | 60.00 |
11/16 x 14 BSF | 17.4625 | 0.6875 | 1.8143 | 14.0000 | 55.00 |
11/16 x 11 BSW | 17.4625 | 0.6875 | 2.3091 | 11.0000 | 55.00 |
M18 x 1.5 (JIS) | 18.0000 | 0.7087 | 1.5000 | 16.9333 | 60.00 |
M18 x 2.5 | 18.0000 | 0.7087 | 2.5000 | 10.1600 | 60.00 |
3/4 x 16 UNF | 19.0500 | 0.7500 | 1.5875 | 16.0000 | 60.00 |
3/4 x 12 BSF | 19.0500 | 0.7500 | 2.1167 | 12.0000 | 55.00 |
3/4 x 10 UNC | 19.0500 | 0.7500 | 2.5400 | 10.0000 | 60.00 |
3/4 x 10 BSW | 19.0500 | 0.7500 | 2.5400 | 10.0000 | 55.00 |
M20 x 1.5 (JIS) | 20.0000 | 0.7874 | 1.5000 | 16.9333 | 60.00 |
M20 x 2.5 | 20.0000 | 0.7874 | 2.5000 | 10.1600 | 60.00 |
13/16 x 12 BSF | 20.6375 | 0.8125 | 2.1167 | 12.0000 | 55.00 |
7/8 x 14 UNF | 22.2250 | 0.8750 | 1.8143 | 14.0000 | 60.00 |
7/8 x 11 BSF | 22.2250 | 0.8750 | 2.3091 | 11.0000 | 55.00 |
7/8 x 9 BSW | 22.2250 | 0.8750 | 2.8222 | 9.0000 | 55.00 |
1 x 12 UNF | 25.4000 | 1.0000 | 2.1167 | 12.0000 | 60.00 |
1 x 10 BSF | 25.4000 | 1.0000 | 2.5400 | 10.0000 | 55.00 |
1 x 8 UNC | 25.4000 | 1.0000 | 3.1750 | 8.0000 | 60.00 |
1 x 8 BSW | 25.4000 | 1.0000 | 3.1750 | 8.0000 | 55.00 |
1 1/8 x 12 UNF | 28.5750 | 1.1250 | 2.1167 | 12.0000 | 60.00 |
1 1/8 x 9 BSF | 28.5750 | 1.1250 | 2.8222 | 9.0000 | 55.00 |
1 1/8 x 7 UNC | 28.5750 | 1.1250 | 3.6286 | 7.0000 | 60.00 |
1 1/8 x 7 BSW | 28.5750 | 1.1250 | 3.6286 | 7.0000 | 55.00 |
1 1/4 x 12 UNF | 31.7500 | 1.2500 | 2.1167 | 12.0000 | 60.00 |
1 1/4 x 9 BSF | 31.7500 | 1.2500 | 2.8222 | 9.0000 | 55.00 |
1 1/4 x 7 UNC | 31.7500 | 1.2500 | 3.6286 | 7.0000 | 60.00 |
1 1/4 x 7 BSW | 31.7500 | 1.2500 | 3.6286 | 7.0000 | 55.00 |
1 3/8 x 12 UNF | 34.9250 | 1.3750 | 2.1167 | 12.0000 | 60.00 |
1 3/8 x 8 BSF | 34.9250 | 1.3750 | 3.1750 | 8.0000 | 55.00 |
1 1/2 x 12 UNF | 38.1000 | 1.5000 | 2.1167 | 12.0000 | 60.00 |
1 1/2 x 8 BSF | 38.1000 | 1.5000 | 3.1750 | 8.0000 | 55.00 |
1 1/2 x 6 UNC | 38.1000 | 1.5000 | 4.2333 | 6.0000 | 60.00 |
1 1/2 x 6 BSW | 38.1000 | 1.5000 | 4.2333 | 6.0000 | 55.00 |
1 5/8 x 8 BSF | 41.2750 | 1.6250 | 3.1750 | 8.0000 | 55.00 |
1 3/4 x 12 UNF | 44.4500 | 1.7500 | 2.1167 | 12.0000 | 60.00 |
1 3/4 x 7 BSF | 44.4500 | 1.7500 | 3.6286 | 7.0000 | 55.00 |
1 3/4 x 5 UNC | 44.4500 | 1.7500 | 5.0800 | 5.0000 | 60.00 |
1 3/4 x 5 BSW | 44.4500 | 1.7500 | 5.0800 | 5.0000 | 55.00 |
2 x 12 UNF | 50.8000 | 2.0000 | 2.1167 | 12.0000 | 60.00 |
2 x 7 BSF | 50.8000 | 2.0000 | 3.6286 | 7.0000 | 55.00 |
2 x 4 UNC | 50.8000 | 2.0000 | 6.3500 | 4.0000 | 60.00 |
2 x 4.5 BSW | 50.8000 | 2.0000 | 5.6444 | 4.5000 | 55.00 |