Standard Tap Dimensions

Tap Dimensions

Machine Screw No. Nominal Dia. Length A Thread Length B Square Length C Shank Dia. D Square Size E
0 1/16 1-5/8 5/16 3/16 .141 .110
1 ---- 1-11/16 3/8 3/16 .141 .110
2 ---- 1-3/4 7/16 3/16 .141 .110
3 3/32 1-13/16 1/2 3/16 .141 .110
4 ---- 1-7/8 9/16 3/16 .141 .110
5 1/8 1-15/16 5/8 3/16 .141 .110
6 ---- 2 11/16 3/16 .141 .110
8 5/32 2-1/8 3/4 1/4 .168 .131
10 3/16 2-3/8 7/8 1/4 .194 .152
12 7/32 2-3/8 15/16 9/32 .220 .165
14 1/4 2-1/2 1 5/16 .255 .191
  5/16 2-23/32 1-1/8 3/8 .318 .238
  3/8 2-15/16 1-1/4 7/16 .381 .286
  7/16 3-5/32 1-7/16 13/32 .323 .242
1/2 3-3/8 1-21/32 7/16 .367 .275
  9/16 3-19/32 1-21/32 1/2 .429 .322
  5/8 3-13/16 1-13/16 9/16 .480 .360
  11/16 4-1/32 1-13/16 5/8 .542 .406
  3/4 4-1/4 2 11/16 .590 .442
  13/16 4-15/32 2 11/16 .652 .489
  7/8 4-11/16 2-7/32 3/4 .697 .523
15/16 4-29/32 2-7/32 3/4 .760 .570
  1 5-1/8 2-1/2 13/16 .800 .600
  1-1/16 5-1/8 2-1/2 7/8 .896 .672
  1-1/8 5-7/16 2-9/16 7/8 .896 .672
  1-13/16 5-7/16 2-9/16 1 1.021 .766
  1-1/4 5-3/4 2-9/16 1 1.021 .766
  1-5/16 5-3/4 2-9/16 1-1/16 1.108 .831
1-3/8 6-1/16 3 1-1/16 1.108 .831
  1-7/16 6-1/16 3 1-1/8 1.233 .925
  1-1/2 6-3/8 3 1-1/8 1.233 .925
  1-5/8 6-11/16 3-3/16 1-1/8 1.305 .979
  1-3/4 7 3-3/16 1-1/4 1.430 1.072
  1-7/8 7-5/16 3-9/16 1-1/4 1.519 1.139
  2 7-5/8 3-9/16 1-3/8 1.644 1.233