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My Account Product Search Product Catalog Metric Coarse Class 8.8Metric Set Screws 8.8Metric Coarse Class 10.9Metric Set Screws 10.9Metric Fine 8.8Metric Fine 10.9Grade 5 UNFGrade 5 Set Screws UNFGrade 5 UNCGrade 5 Set Screws UNCGrade 8 UNFGrade 8 UNCGrade C LocknutsGrade 9NylocsWashersSpecialsBrassCapscrewsFlangeFlange NutsGrade 8 UNC Plow BoltsKemtekLocknuts/ConelocksMetalfixRivetsRivnutsRivtecSpectrumStainless SteelStudsWing Nuts
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US Tap id Drill Chart

This technical information has been supplied by boltdepot.com

Tap
Fractional Drill Bit
Number Drill Bit
Letter Drill Bit
0-80
3/64
-
-
1-64
-
53
-
2-56
-
50
-
3-48
-
47
-
4-40
3/32
43
-
5-40
-
38
-
6-32
7/64
35
-
8-32
-
29
-
10-24
5/32
25
-
10-32
5/32
21
-
12-24
11/64
16
-
1/4-20
13/64
7
-
1/4-28
7/32
3
-
5/16-18
17/64
-
F
5/16-24
-
-
I
3/8-16
5/16
-
-
3/8-24
21/64
-
Q
7/16-14
23/64
-
U
7/16-20
25/64
-
-
1/2-13
27/64
-
-
1/2-20
29/64
-
-
9/16-12
31/64
-
-
9/16-18
33/64
-
-
5/8-11
17/32
-
-
5/8-18
37/64
-
-
3/4-10
21/32
-
-
3/4-16
11/16
-
-
Drill sizes are for 75% depth of thread.