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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.
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.


===Abbreviations and Units===
===Abbreviations and Units===
Line 211: Line 210:
*Degrees Fahrenheit = (°C × 1.8) + 32  Degrees Celsius (Degrees Centigrade; °C) = (°F - 32) × 0.56
*Degrees Fahrenheit = (°C × 1.8) + 32  Degrees Celsius (Degrees Centigrade; °C) = (°F - 32) × 0.56


=== Bolt sizes and Threads===
{| class="wikitable" style=""
|style="text-align:center;" | '''Centigrade''' ||-30||-29||-28||-27||-26||-25||-24||-23||-22||-21||-20||-19||-18||-17||-16||-15||-14||-13||-12||-11||-10||-9||-8||-7||-6||-5||-4||-3||-2||-1||0
|-
|style="text-align:center;" | '''Fahrenheit''' || -22||-20.2||-18.4||-16.6||-14.8||-13||-11.2||-9.4||-7.6||-5.8||-4||-2.2||-0.4||1.4||3.2||5||6.8||8.6||10.4||12.2||14||15.8||17.6||19.4||21.2||23||24.8||26.6||28.4||30.2||32
|-
|}
 
{| class="wikitable" style=""
|style="text-align:center;" | '''Centigrade''' ||1||2||3||4||5||6||7||8||9||10||11||12||13||14||15||16||17||18||19||20||21||22||23||24||25||26||27||28||29||30||31||32||33||34||35||36||37||38
|-
|style="text-align:center;" | '''Fahrenheit''' ||33.8||35.6||37.4||39.2||41||42.8||44.6||46.4||48.2||50||51.8||53.6||55.4||57.2||59||60.8||62.6||64.4||66.2||68||69.8||71.6||73.4||75.2||77||78.8||80.6||82.4||84.2||86||87.8||89.6||91.4||93.2||95||96.8||98.6||100.44
|-
|}
 
== Bolt sizes and Threads==
====BA Screws and Threads====
====BA Screws and Threads====
{| class="wikitable" style="margin-left: 1em;"
{| class="wikitable" style="margin-left: 1em;"
Line 250: Line 263:
| 25 || 0.072 || 0.25 || 352.78 || 0.0098 || 0.4375 || 0.0172 || .
| 25 || 0.072 || 0.25 || 352.78 || 0.0098 || 0.4375 || 0.0172 || .
|}
|}


====Common Screw Sizes and Standards====
====Common Screw Sizes and Standards====
Key (with Wikipedia links):
*M - [https://en.wikipedia.org/wiki/ISO_metric_screw_thread ISO Metric]
*UNF - [https://en.wikipedia.org/wiki/Unified_Thread_Standard Unified National Fine]
*UNC - [https://en.wikipedia.org/wiki/Unified_Thread_Standard Unified National Course]
*BSW - [https://en.wikipedia.org/wiki/British_Standard_Whitworth British Standard Whitworth]
*BSF - [https://en.wikipedia.org/wiki/British_Standard_Fine British Standard Fine]
*BA - [https://en.wikipedia.org/wiki/British_Association_screw_threads British Association]
*JIS - Japanese Industrial Standard - Specifically JIS B 1012 which describes a variation of the [https://en.wikipedia.org/wiki/List_of_screw_drives#JIS_B_1012 crosshead drive].
{| class="wikitable" style="margin-left:1em"
{| class="wikitable" style="margin-left:1em"
! Designation !! Nominal Dia (mm) !! Nominal Dia (inch) !! Pitch (mm) !! Pitch (per inch) !! Angle
! Designation !! Nominal Dia (mm) !! Nominal Dia (inch) !! Pitch (mm) !! Pitch (per inch) !! Angle
Line 462: Line 486:
|-
|-
| 2 x 4.5 BSW || 50.8000 || 2.0000 || 5.6444 || 4.5000 || 55.00
| 2 x 4.5 BSW || 50.8000 || 2.0000 || 5.6444 || 4.5000 || 55.00
|}
====Rivet Nut Sizes and holes====
A rivet nut, also known as a nutsert or rivnut, is a clever fastener that combines the features of a rivet and a nut into a single piece. It's essentially a hollow, internally threaded tube with a deformable head on one end.
To install it, the rivet nut is placed into a pre-drilled hole in a thin sheet of material, and a special tool is used to pull on the threads, causing the hollow shank to collapse and flare out behind the material. This action permanently clamps the rivet nut in place, creating a strong, reliable threaded insert. This is particularly useful in materials that are too thin or brittle to tap a conventional thread, providing a durable anchor point for bolts and screws.
{| class="wikitable" style="margin-left:1em"
! Designation !! Internal Dia (mm) !! External Dia (mm-steel) !! Hole size (mm-steel) !! External Dia (mm-alum) !! Hole size (mm-alum)
|-
| M3 || 3 || 4.9 || 5 || 5 || 5.5
|-
| M4 || 4 || 5.7 || 6 || 6 || 6.5
|-
| M5 || 5 || 6.8 || 7 || 7 || 7.5
|-
| M6 || 6 || 8.8 || 9 || 9 || 9.5
|-
| M8 || 8 || 10.7 || 11 || 11 || 11.5
|-
| M10 || 10 || 12.8 || 13 || 13 || 13.5
|-
| M12 || 12 || 14.8 || 15 || 15 || 15.5
|}
|}

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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.

Abbreviations and Units

Metric Prefixes for SI Units

P (PETA_) = x 1,000,000,000,000,000 (or 10-15)

T (TERA_) = x 1,000,000,000,000 (or 10-12)

G (GIGA-) = x 1,000,000,000 (or 10-9)

M (MEG-) = x 1,000,000 (or 106

K (KILO-) = × 1,000 (or 103

h (HECTO-) = x 100 (or 102)

d (DECI-) = x 1.0 (or 10-1)

c (CENTI-) = x 0.01 (or 10-2)

m (MILLI-) = x 0.001 (or /1000 or 10-3)

µ (MICRO-) = x 0.000 001 (or /1000000 or 10-6) (also mc)

n (NANO-) = x 0.000 000 001 (or /1000000000 or 10-9)

p (PICO-) = x 0.000 000 000 001 (or /10000000000 or 10-12)

f (FEMTO-) = x 0.000 000 000 000 001 (or /10000000000000 or 10-15)

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
Centigrade -30 -29 -28 -27 -26 -25 -24 -23 -22 -21 -20 -19 -18 -17 -16 -15 -14 -13 -12 -11 -10 -9 -8 -7 -6 -5 -4 -3 -2 -1 0
Fahrenheit -22 -20.2 -18.4 -16.6 -14.8 -13 -11.2 -9.4 -7.6 -5.8 -4 -2.2 -0.4 1.4 3.2 5 6.8 8.6 10.4 12.2 14 15.8 17.6 19.4 21.2 23 24.8 26.6 28.4 30.2 32
Centigrade 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38
Fahrenheit 33.8 35.6 37.4 39.2 41 42.8 44.6 46.4 48.2 50 51.8 53.6 55.4 57.2 59 60.8 62.6 64.4 66.2 68 69.8 71.6 73.4 75.2 77 78.8 80.6 82.4 84.2 86 87.8 89.6 91.4 93.2 95 96.8 98.6 100.44

Bolt sizes and Threads

BA Screws and Threads

BA Thread pitch Outside diameter Threads density Outside diameter Spanner Tapping Drill Size
(mm) (mm) threads per inch(tpi) (in) (mm) (in) (mm)
0 1.00 6.00 25.40 0.2362 10.5000 0.4134 5.1
1 0.90 5.30 28.22 0.2087 9.2750 0.3652 4.5
2 0.81 4.70 31.36 0.1850 8.2250 0.3238 4
3 0.73 4.10 34.79 0.1614 7.1750 0.2825 3.4
4 0.66 3.60 38.48 0.1417 6.3000 0.2480 3
5 0.59 3.20 43.05 0.1260 5.6000 0.2205 2.65
6 0.53 2.80 47.92 0.1102 4.9000 0.1929 2.3
7 0.48 2.50 52.92 0.0984 4.3750 0.1722 2.05
8 0.43 2.20 59.07 0.0866 3.8500 0.1516 1.8
9 0.39 1.90 65.13 0.0748 3.3250 0.1309 1.55
10 0.35 1.70 72.57 0.0669 2.9750 0.1171 1.4
⋮
25 0.072 0.25 352.78 0.0098 0.4375 0.0172 .


Common Screw Sizes and Standards

Key (with Wikipedia links):

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

Rivet Nut Sizes and holes

A rivet nut, also known as a nutsert or rivnut, is a clever fastener that combines the features of a rivet and a nut into a single piece. It's essentially a hollow, internally threaded tube with a deformable head on one end.

To install it, the rivet nut is placed into a pre-drilled hole in a thin sheet of material, and a special tool is used to pull on the threads, causing the hollow shank to collapse and flare out behind the material. This action permanently clamps the rivet nut in place, creating a strong, reliable threaded insert. This is particularly useful in materials that are too thin or brittle to tap a conventional thread, providing a durable anchor point for bolts and screws.

Designation Internal Dia (mm) External Dia (mm-steel) Hole size (mm-steel) External Dia (mm-alum) Hole size (mm-alum)
M3 3 4.9 5 5 5.5
M4 4 5.7 6 6 6.5
M5 5 6.8 7 7 7.5
M6 6 8.8 9 9 9.5
M8 8 10.7 11 11 11.5
M10 10 12.8 13 13 13.5
M12 12 14.8 15 15 15.5
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