Red and white pattern of small, repeating, interconnected geometric shapes.

About

About Jarvis

Right-pointing arrow icon with a horizontal line transitioning from transparent to solid red.

Jarvis Newsfeed

Right-pointing arrow icon with a horizontal line transitioning from transparent to solid red.

Tradeshows/Events

Right-pointing arrow icon with a horizontal line transitioning from transparent to solid red.

Open Jobs

Right-pointing arrow icon with a horizontal line transitioning from transparent to solid red.

Literature/Catalogues

Right-pointing arrow icon with a horizontal line transitioning from transparent to solid red.

Our History

Right-pointing arrow icon with a horizontal line transitioning from transparent to solid red.

Jarvis Photo Album

Right-pointing arrow icon with a horizontal line transitioning from transparent to solid red.

Solar Power

Right-pointing arrow icon with a horizontal line transitioning from transparent to solid red.

Products

About Taps

Right-pointing arrow icon with a horizontal line transitioning from transparent to solid red.

Additional Tap Features

Right-pointing arrow icon with a horizontal line transitioning from transparent to solid red.

Taps

Right-pointing arrow icon with a horizontal line transitioning from transparent to solid red.

Other Products

Right-pointing arrow icon with a horizontal line transitioning from transparent to solid red.

Standard Taps

Right-pointing arrow icon with a horizontal line transitioning from transparent to solid red.

Forming Taps

Right-pointing arrow icon with a horizontal line transitioning from transparent to solid red.
Right-pointing arrow icon with a horizontal line transitioning from transparent to solid red.

Special Taps

Pipe Taps

Right-pointing arrow icon with a horizontal line transitioning from transparent to solid red.

Cut Taps

Right-pointing arrow icon with a horizontal line transitioning from transparent to solid red.
Right-pointing arrow icon with a horizontal line transitioning from transparent to solid red.

Other Products

Industries

Aerospace

Right-pointing arrow icon with a horizontal line transitioning from transparent to solid red.

Agriculture

Right-pointing arrow icon with a horizontal line transitioning from transparent to solid red.

Automotives

Right-pointing arrow icon with a horizontal line transitioning from transparent to solid red.

Engines

Right-pointing arrow icon with a horizontal line transitioning from transparent to solid red.

Heavy Equipments

Right-pointing arrow icon with a horizontal line transitioning from transparent to solid red.

Guns-Knives-Archery

Right-pointing arrow icon with a horizontal line transitioning from transparent to solid red.

Machine Builder

Right-pointing arrow icon with a horizontal line transitioning from transparent to solid red.

Engineering

Classes 2B & 3B

Right-pointing arrow icon with a horizontal line transitioning from transparent to solid red.

Class 6H

Right-pointing arrow icon with a horizontal line transitioning from transparent to solid red.
Forming: Tap Drill Sizes
Right-pointing arrow icon with a horizontal line transitioning from transparent to solid red.
H-Limits
Right-pointing arrow icon with a horizontal line transitioning from transparent to solid red.

Metric: Tap Drill Sizes

Right-pointing arrow icon with a horizontal line transitioning from transparent to solid red.
STI: Tap Drill Sizes
Right-pointing arrow icon with a horizontal line transitioning from transparent to solid red.
Tap Dimensions
Right-pointing arrow icon with a horizontal line transitioning from transparent to solid red.
Tap Drill Sizes
Right-pointing arrow icon with a horizontal line transitioning from transparent to solid red.
Tapping Speeds
Right-pointing arrow icon with a horizontal line transitioning from transparent to solid red.
Tolerance Zones
Right-pointing arrow icon with a horizontal line transitioning from transparent to solid red.
UNJ Threads
Right-pointing arrow icon with a horizontal line transitioning from transparent to solid red.

Customer Help

Customer Help Portal

Right-pointing arrow icon with a horizontal line transitioning from transparent to solid red.

Application To Set Up Account

Right-pointing arrow icon with a horizontal line transitioning from transparent to solid red.

Credit Application

Right-pointing arrow icon with a horizontal line transitioning from transparent to solid red.

FAQ’s

Right-pointing arrow icon with a horizontal line transitioning from transparent to solid red.

Pricing & Ordering

Contact Us

TAP Dimensions

Standard Tap Blank Dimensions

Reference USCTI Table 302


Tap Size Metric Equivalent Overall Length Thread Length Square Length Shank Diameter Square Size
0M1.61 5/85/163/16.141.110
1M1.81 11/163/83/16.141.110
2M2, M2.21 3/47/163/16.141.110
3M2.51 13/161/23/16.141.110
4—1 7/89/163/16.141.110
5M3, M3.151 15/165/83/16.141.110
6M3.5211/163/16.141.110
8M42 1/83/41/4.168.131
10M4.5, M52 3/87/81/4.194.152
12—2 3/815/169/32.220.165
1/4M6, M6.32 1/215/16.255.191
5/16M7, M82 23/321 1/83/8.318.238
3/8M9, M102 15/161 1/47/16.381.286
7/16M113 5/321 7/1613/32.323.242
1/2M12, M12.53 3/81 21/327/16.367.275
9/16M143 19/321 21/321/2.429.322
5/8M163 13/161 13/169/16.480.360
11/16M184 1/321 13/165/8.542.406
3/4—4 1/4211/16.590.442
13/16M204 15/32211/16.652.489
7/8M224 11/162 7/323/4.697.523
15/16M244 29/322 7/323/4.760.570
1M255 1/82 1/213/16.800.600
1 1/16 LongM275 1/82 1/27/8.896.672
1 1/16 ShortM2741 1/27/8.896.672
1 1/8 Long—5 7/162 9/167/8.896.672
1 1/8 Short—41 1/27/8.896.672
1 3/16 LongM305 7/162 9/1611.021.766
1 3/16 ShortM3041 1/211.021.766
1 1/4 Long—5 3/42 9/1611.021.766
1 1/4 Short—41 1/211.021.766
1 5/16 LongM335 3/42 9/161 1/161.108.831
1 5/16 ShortM3341 1/211.108.831
1 3/8 Long—6 1/1631 1/161.108.831
1 3/8 Short—41 1/211.108.831
1 7/16 LongM366 1/1631 1/81.233.925
1 7/16 ShortM3641 1/211.233.925
1 1/2 LongM386 3/831 1/81.233.925
1 1/2 ShortM3841 1/211.233.925
1 5/8 LongM396 11/163 3/161 1/81.305.979
1 5/8 ShortM39521 1/81.305.979
1 3/4 LongM4273 3/161 1/41.4301.072
1 3/4 ShortM42521 1/41.4301.072
1 7/8 LongM457 5/163 9/161 1/41.5191.139
1 7/8 ShortM45521 1/41.5191.139
2 LongM487 5/83 9/161 3/81.6441.233
2 ShortM48521 3/81.6441.233
2 1/8 Long—83 9/161 3/81.7691.327
2 1/8 Short—5 1/421 3/81.7691.327
2 1/4 LongM568 1/43 9/161 7/161.8941.420
2 1/4 ShortM565 1/421 7/161.8941.420
2 3/8 Long—8 1/241 7/162.0191.514
2 3/8 Short—5 1/421 7/162.0191.514
2 1/2 Long—8 3/441 1/22.1001.575
2 1/2 Short—5 1/421 1/22.1001.575
2 5/8 LongM648 3/441 1/22.2251.669
2 5/8 ShortM645 1/221 1/22.1001.575
2 3/4 Long—9 1/441 9/162.3501.762
2 3/4 Short—5 1/221 1/22.1001.575
2 7/8 LongM729 1/441 9/162.4751.856
2 7/8 ShortM725 1/221 1/22.1001.575
3 Long—9 3/44 9/161 5/82.5431.907
3 Short—5 1/221 1/22.1001.575

Printable Version

Arrow pointing diagonally upward and to the right, indicating an increase or external link.

Standard Pipe Tap Dimensions Straight and Taper, Ground Thread

Technical diagram of a machine tap, illustrating dimensions for total length (L), thread length (l), shank length (l2), and (d1).
Technical drawing of a machine tap with dimensional measurement labels for total length and shank details.
Technical drawing of a machine tap, showing dimensions for length (L), thread length (l), shank length (l2), and shank (d1).

General Dimensions


Dimensions - Inches
Nominal
Size
Inches		 Length
Overall
L		 Length
of
Thread
l		 Length
of
Square
l₂		 Dia.
of
Shank
d₁		 Size
of
Square
a		 Length
Optional
Neck
l₁
1/162.13.69.38.3125.234.375
1/82.13.75.38.3125.234...
1/82.13.75.38.4375.328.375
1/42.441.06.44.5625.421.375
3/82.561.06.50.7000.531.375
1/23.131.38.63.6875.515...
3/43.251.38.69.9063.679...
1"3.751.75.811.1250.843...
1-1/44.001.75.941.3125.984...
1-1/24.251.751.001.50001.125...
2"4.251.751.131.87501.406...
2-1/25.502.561.252.25001.687...
3"6.002.631.382.62501.968...
3-1/26.502.691.502.81252.108...
4"6.752.751.563.00002.250...

Tolerances


Element Range Direction Tolerance
Length Overall – L1/16 to 3/4 inc.Plus or Minus.031
1" to 4" inc.Plus or Minus.063
Length of Thread – l1/16 to 3/4 inc.Plus or Minus.063
1" to 1-1/4 inc.Plus or Minus.094
1-1/2 to 4"Plus or Minus.125
Length of Square - l₂1/16 to 3/4 inc.Plus or Minus.031
1" to 4" inc.Plus or Minus.063
Diameter of Shank -1/16 to 1/8Minus.0015
1/4 to 1" inc.Minus.0020
1-1/4 to 4" inc.Minus.0030
Size of Square – a1/16 to 1/8Minus.004
1/4 to 3/4 inc.Minus.006
1" to 4" inc.Minus.008

Note

For thread limits and tolerances see Tables 335,335A and 338.

For eccentricity tolerances of taps see Table 317.

Printable Version

Arrow pointing diagonally upward and to the right, indicating an increase or external link.

We’re Here For Whatever You Need

Customer support, engineering support, or general inquires. 

Contact Us

A minimalist, stylized icon of a cloud with a circular shape suspended beneath it, depicted in solid white.