Tap Drill Sizes
| Clearance Hole Drills |
Size of Screw | | Tap Drill | Close Fit | Free Fit |
No. or Dia. | Decimal (inch) | TPI | Drill Size | Decimal (inch) | Drill Size | Decimal (inch) | Drill Size | Decimal (inch) |
Fractl. | Num. |
#0 | 0.06 | 80 | 3/64 | | 0.0469 | 52 | 0.0635 | 50 | 0.07 |
#1 | 0.073 | 64 | | 53 | 0.0595 | 48 | 0.076 | 46 | 0.081 |
#1 | 0.073 | 72 | | 53 | 0.0595 | 48 | 0.076 | 46 | 0.081 |
#2 | 0.086 | 56 | | 50 | 0.07 | 43 | 0.089 | 41 | 0.096 |
#2 | 0.086 | 64 | | 50 | 0.07 | 43 | 0.089 | 41 | 0.096 |
#3 | 0.099 | 48 | | 47 | 0.0785 | 37 | 0.104 | 35 | 0.11 |
#3 | 0.099 | 56 | | 45 | 0.082 | 37 | 0.104 | 35 | 0.11 |
#4 | 0.112 | 36 | | 44 | 0.086 | 32 | 0.116 | 30 | 0.1285 |
#4 | 0.112 | 40 | 3/32 | 43 | 0.089 | 32 | 0.116 | 30 | 0.1285 |
#4 | 0.112 | 48 | | 42 | 0.0935 | 32 | 0.116 | 30 | 0.1285 |
#5 (1/8) | 0.125 | 40 | | 38 | 0.1015 | 30 | 0.1285 | 29 | 0.136 |
#5 | 0.125 | 44 | | 37 | 0.104 | 30 | 0.1285 | 29 | 0.136 |
#6 | 0.138 | 32 | 7/64 | 36 | 0.1065 | 27 | 0.144 | 25 | 0.1495 |
#6 | 0.138 | 40 | | 33 | 0.113 | 27 | 0.144 | 25 | 0.1495 |
#8 | 0.164 | 32 | 9/64 | 29 | 0.136 | 18 | 0.1695 | 16 | 0.177 |
#8 | 0.164 | 36 | 9/64 | 29 | 0.136 | 18 | 0.1695 | 16 | 0.177 |
#10 | 0.19 | 24 | 5/32 | 25 | 0.1495 | 9 | 0.196 | 7 | 0.201 |
#10 | 0.19 | 32 | 5/32 | 21 | 0.159 | 9 | 0.196 | 7 | 0.201 |
#12 | 0.216 | 24 | 11/64 | 16 | 0.177 | 2 | 0.221 | I | 0.228 |
#12 | 0.216 | 28 | 3/16 | 14 | 0.182 | 2 | 0.221 | I | 0.228 |
#14 | 0.242 | 20 | | 10 | 0.1935 | D | 0.246 | F | 0.257 |
#14 | 0.242 | 24 | 13/64 | 7 | 0.201 | D | 0.246 | F | 0.257 |
1/4 | 0.25 | 20 | 13/64 | 7 | 0.201 | F | 0.257 | H | 0.266 |
1/4 | 0.25 | 28 | 7/32 | 3 | 0.213 | F | 0.257 | H | 0.266 |
5/16 | 0.3125 | 18 | 17/64 | F | 0.257 | P | 0.323 | Q | 0.332 |
5/16 | 0.3125 | 24 | | I | 0.272 | P | 0.323 | Q | 0.332 |
3/8 | 0.375 | 16 | 5/16 | | 0.3125 | W | 0.386 | X | 0.397 |
3/8 | 0.375 | 24 | 21/64 | Q | 0.332 | W | 0.386 | X | 0.397 |
7/16 | 0.4375 | 14 | 23/64 | U | 0.368 | 29/64 | 0.4531 | 15/32 | 0.4687 |
7/16 | 0.4375 | 20 | 25/64 | | 0.3906 | 29/64 | 0.4531 | 15/32 | 0.4687 |
1/2 | 0.5 | 13 | 27/64 | | 0.4219 | 33/64 | 0.5156 | 17/32 | 0.5312 |
1/2 | 0.5 | 20 | 29/64 | | 0.4531 | 33/64 | 0.5156 | 17/32 | 0.5312 |
9/16 | 0.5625 | 12 | 31/64 |
9/16 | 0.5625 | 18 | 33/64 |
5/8 | 0.625 | 11 | 17/32 |
5/8 | 0.625 | 18 | 37/64 |
3/4 | 0.75 | 10 | 21/32 |
3/4 | 0.75 | 16 | 11/16 |
Source: Tap Drill Sizes at efunda.com and BoltDepot.com
See: Drill Sizes
See Also: BoltDepot.com
Metric Tap Drill Sizes |
Tap Size |
Tap Drill Size |
|
Tap Size |
Tap Drill Size |
|
Tap Size |
Tap Drill Size |
M2 x .4 |
1.60mm |
|
M10 x 1.5 |
8.5mm |
|
M18 x 2.5 |
15.5mm |
M2.5 x .45 |
2.05mm |
|
M10 x 1.25 |
8.75mm |
|
M18 x 1.5 |
16.5mm |
M3 x .5 |
2.5mm |
|
M12 x 1.75 |
10.25mm |
|
M20 x 2.5 |
17.5mm |
M4 x .7 |
3.3mm |
|
M12 x 1.25 |
10.75mm |
|
M20 x 1.5 |
18.5mm |
M5 x .8 |
4.2mm |
|
M14 x 2.0 |
12mm |
|
M24 x 3.0 |
21mm |
M6 x 1.0 |
5mm |
|
M14 x 1.5 |
12.5mm |
|
M30 x 3.5 |
26.5mm |
M8 x 1.25 |
6.75mm |
|
M16 x 2.0 |
14mm |
|
M36 x 4.0 |
32mm |
M8 x 1.0 |
7mm |
|
M16 x 1.5 |
14.5mm |
|
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Drill Bits
last updated 1 Apr 2005
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