| Screw Size | Major Dia. (inches) |
Clearance Drill Close/Loose |
UNC TPI /Tap Drill |
UNF TPI / Tap Drill |
UNEF TPI |
Hex/Nut Wrench Size | |||
|---|---|---|---|---|---|---|---|---|---|
|
0
|
0.0600 | #52 | #50 | - | - | 80 | 3/64" | - | 5/32" |
|
1
|
0.0730 | #48 | #46 | 64 | #52 | 72 | #53 | - | 5/32" |
|
2
|
0.0860 | #43 | #41 | 56 | #50 | 64 | #50 | - | 3/16" |
|
3
|
0.0990 | #37 | #35 | 48 | #47 | 56 | #45 | - | 3/16" |
|
4
|
0.1120 | #32 | #30 | 40 | #43 | 48 | #42 | - | 1/4" |
|
5
|
0.1250 | #30 | #29 | 40 | #39 | 44 | #37 | - | 1/4" |
|
6
|
0.1380 | #27 | #25 | 32 | #36 | 40 | #33 | - | 5/16" |
|
8
|
0.1640 | #18 | #16 | 32 | #29 | 36 | #29 | - | 11/32" |
|
10
|
0.190 | #9 | #7 | 24 | #25 | 32 | #21 | 3/8" | |
|
12
|
0.216 | #2 | #1 | 24 | 28 | 32 | 7/16" | ||
|
1/4"
|
0.2500 | F | H (17/64") | 20 | #7 | 28 | #3 | 32 | 7/16" |
|
5/16"
|
0.3125 | P | Q (21/64") | 18 | F | 24 | I | 32 | 9/16" |
|
3/8"
|
0.375 | W | X (25/64") | 16 | 5/16" | 24 | Q | 32 | 5/8" |
|
7/16"
|
0.4375 | 29/64" | 15/32" | 14 | U | 20 | 25/64" | 28 | 11/16" |
|
1/2"
|
0.5000 | 33/64" | 17/32" | 13 | 27/64" | 20 | 29/64" | 28 | 3/4" |
|
9/16"
|
0.5625 | 9/16" | 37/64" | 12 | 31/64" | 18 | 33/64" | 24 | 7/8" |
|
5/8"
|
0.6250 | 5/8" | 21/32" | 11 | 17/32" | 18 | 37/64" | 24 | 15/16" |
|
3/4"
|
0.7500 | 3/4 | 13/16" | 10 | 21/32" | 16 | 11/16" | 20 | 1-1/8" |
|
7/8"
|
0.8750 | 7/8" | 15/16" | 9 | 49/64" | 14 | 13/16" | 20 | 15/16" |
|
1"
|
1.0000 | 1" | 1-1/16" | 8 | 7/8" | 12 | 29/32" | 20 | 11/2" |
| Screw Size | Major Dia. (mm) |
Clearance Drill Close/Loose (mm) |
Coarse Pitch /Tap Drill (mm/in) |
Fine Pitch / Tap Drill (mm/in) |
Hex/Nut Wrench Size | |||
|---|---|---|---|---|---|---|---|---|
|
M2
|
2 | 2.4 | 2.6 | 0.4 | 1.6 (#63) | 4 | ||
|
M3
|
3 | 3.4 | 4.0 | 0.5 | 2.5 (#40) | 5.5 | ||
|
M4
|
4 | 4.5 | 5.0 | 0.7 | 3.3 (#30) | 0.35 | 3.7 | 7 |
|
M5
|
5 | 5.3 | 5.8 | 0.8 | 4.2 (#19) | 0.5 | 4.5 | 8 |
|
M6
|
6 | 6.4 | 7.0 | 1.0 | 5.0 (#9) | 0.75 | 5.25 | 10 |
|
M8
|
8 | 8.4 | 10.0 | 1.25 | 6.8 (17/64) | 1.0 | 7.5 | 13 (12ns) |
|
M10
|
10 | 10.5 | 12 | 1.5 | 8.5 (Q) | 1.25 | 8.8 (11/32) | 17 (16ns) |
|
M12
|
12 | 13.0 | 14.5 | 1.75 | 10.2 (Y) | 1.25 | 10.8 (27/64) | 19 (18ns) |
|
M14
|
14 | 15.0 | 16.5 | 2.0 | 12 (15/32) | 1.5 | 12.5 (1/2) | 22 (21ns) |
|
M16
|
16 | 17.0 | 18.5 | 2.0 | 14 (35/64) | 1.5 | 14.5 (37/64) | 24 |
|
M20
|
20 | 21.0 | 24.0 | 2.5 | 17.5 (11/16) | 1.5 | 18.5 (47/64) | 30 |
|
M24
|
24 | 25.0 | 28.0 | 3.0 | 21 (53/64) | 2 | 22 (7/8) | 36 |
|
M30
|
30 | 31.0 | 33.0 | 3.5 | 26.5 | 2 | 28 | 46 |