Tap and Drill Size Chart

THREADSIZE DRILL DIAMETER

 

Coarse Thread

TAP
DRILL
SIZE
1-64 .0595 No. 53
2-56 .0700 No. 50
3-48 .0785 No. 47
4-40 .0890 No. 43
5-40 .1015 No. 38
6-32 .1065 No. 36
8-32 .1360 No. 29
10-24 .1495 No. 25
12-24 .1770 No. 16
1/4-20 .2010 No. 7
5/16-18 .2570 ‘F’
3/8-16 .3125 5/16
7/16-14 .3680 ‘U’
1/2-13 .4219 27/64
9/16-12 .4844 31/64
5/8-11 .5312 17/32
3/4-10 .6562 21/32
7/8-9 .7656 49/64
1″-8 .8750 7/8
Fine Thread
0-80 .0469 3/64
1-72 .0595 No. 53
2-64 .0700 No. 50
3-56 .0820 No. 45
4-48 .0935 No. 42
5-44 .1040 No. 37
6-40 .1130 No. 33
8-36 .1360 No. 29
10-32 .1590 No. 21
12-28 .1820 No. 14
1/4-28 .2130 No. 3
5/16-24 .2720 ‘I’
3/8-24 .3320 ‘Q’
7/16-20 .3906 25/64
1/2-20 .4531 29/64
9/16-18 .5156 33/64
5/8-18 .5781 37/64
3/4-16 .6875 11/16
7/8-14 .8125 13/16
1″-14 .9375 59/64

Ronnie Collins

Ronnie Collins

I’m Ronnie Collins. I’ve been passionate about gardening and woodworking all my life and even earned an MS degree in Botany from the University of Maryland. I’ve been working at a gardening company for a while, so I know the ropes about a whole lot of dedicated equipment such as the table saw, track saw, lawnmowers, chainsaws, garden hoses, and much more.

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