Screw To Drill Bit Size Chart
Reference Page for Using the Correct Size Pilot Drill Per Screw
When it comes to mechanics or even body work, there are always nuts and bolts. Although not my favorites to use, there are times when sheet metal screws are required. There is nothing more aggravating when you just don't know what size drill bit to use for a pilot.
To help my readers out, I thought I would add this quick reference chart. This should help whenever you run into a situation you need to drill a pilot hole and are not sure the size bit.
I also have included the chart for drill bit size per tap size. In case you need to drill a hole and thread it for a screw or bolt.
Sheet Metal Screw to Drill Bit Size Table
Screw Size | Drill Bit Size |
|---|---|
2 | 3/32in |
4 | 1/8in |
6 | 5/32in |
8 | 3/16in |
10 | 13/64in |
12 | 1/4in |
1/4in | 9/32in |
5/16in | 21/64in |
3/8in | 25/64in |
Tap and Drill Size Chart (Standard)
Tap Size | Drill Bit | Drill Bit size inch |
|---|---|---|
0-80 | 3/64in | |
1-64 | 53 | 1/16in |
1-72 | 53 | 1/16in |
2-56 | 51 | |
2-64 | 50 | |
3-48 | 5/64in | |
3-56 | 46 | |
4-40 | 44 | |
4-48 | 42 | |
5-40 | 39 | |
5-44 | 38 | |
6-32 | 36 | |
6-40 | 33 | |
8-32 | 29 | 9/64 |
8-36 | 29 | 9/64 |
10-24 | 25 | 5/32 |
10-32 | 21 | 5/32 |
12-24 | 17 | |
12-28 | 15 | |
1/4-20 | 7 | 13/64 |
1/4-28 | 3 | 7/32 |
5/16-18 | F | 1/4 - 17/64 closest Match |
5/16-24 | I | 1/4 - 17/64 closest Match |
3/8-16 | 5/16 | |
3/8-24 | Q | |
7/16-14 | 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 | |
7/8-9 | 49/64 | |
7/8-14 | 13/16 | |
1-8 | 7/8 | |
1-12 | 59/64 | |
1-14 | 15/16 | |
1-1/8—7 | 63/64 | |
1-1/8—12 | 1-3/64 | |
1-1/4—7 | 1-7/64 | |
1-1/4—12 | 1-11/64 | |
1-3/8—6 | 1-7/32 | |
1-3/8—12 | 1-19/64 | |
1-1/2—6 | 1-11/32 | |
1-1/2—12 | 1-27/64 |
Tap and Drill Size Chart (Metric)
Tap Size | Drill Bit | Drill Bit size |
|---|---|---|
M1.6 x .35 | 1.25mm | |
M2 x .4 | 1/16in | |
M2.5 x .45 | 2.05mm | |
M3 x .5 | 40 | |
M3.5 x .6 | 33 | |
M4 x .7 | 3.25mm | |
M5 x .8 | 4.2mm | |
M6 x 1 | 10 | |
m8 x 1.25 | 6.7mm | |
M10 x 1.5 | 8.4mm | |
M12 x 1.75 | 13/32in | |
M14 x 2 | 15/32in | |
M16 x 2 | 35/64in | |
M20 x 2.5 | 11/16in | |
M24 x 3 | 53/64in | |
M30 x 3.5 | 1-3/64in | |
M36 x 4 | 1-1/4in |
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