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Here
are a few charts that may come in handy when dealing with
fasteners…
American Standard Taper Pipe Thread
Drill Chart |
Size Threads/Inch |
Tap Drill Size |
Decimal Equivalent |
| 1/16" - 27 |
D |
.246 |
| 1/8" - 27 |
11/32 |
.3438 |
| 1/4" - 18 |
7/16 |
.4375 |
| 3/8" - 18 |
19/32 |
.5938 |
| 1/2" - 14 |
23/32 |
.7188 |
| 3/4" - 14 |
15/16 |
.9375 |
| 1" - 11-1/2 |
1-5/32 |
1.1562 |
Machine Screw Drill Chart |
Size Threads/Inch
|
Tap Drill Size
|
Decimal Equivalent
|
0 - 80 |
3/64 |
.0469 |
1 - 64 |
#53 |
.0595 |
1 - 72 |
#53 |
.0595 |
2 - 56 |
#50 |
.070 |
2 - 64 |
#50 |
.070 |
3 - 48 |
#47 |
.0785 |
3 - 56 |
#45 |
.082 |
4 - 40 |
#43 |
.089 |
4 - 48 |
#42 |
.0935 |
5 - 40 |
#38 |
.1015 |
5 - 44 |
#37 |
.104 |
6 - 32 |
#36 |
.1065 |
6 - 40 |
#33 |
.113 |
8 - 32 |
#29 |
.136 |
8 - 36 |
#29 |
.136 |
10 - 24 |
#25 |
.1495 |
10 - 32 |
#21 |
.159 |
12 - 24 |
#16 |
.177 |
12 - 28 |
#14 |
.182 |
Grade 8 Bolt Drill
& Torque Chart in foot pounds |
Size Threads/Inch |
Tap Drill Size |
Decimal Equivalent |
Torque - FT LBS. Dry |
Torque - FT LBS. Lubricated |
| 1/4" - 20 |
#7 |
.201 |
12 |
9 |
| 1/4" - 28 |
#3 |
.213 |
14 |
10 |
| 5/16" - 24 |
F |
.257 |
25 |
18 |
| 5/16" - 24 |
I |
.272 |
25 |
20 |
| 3/8" - 16 |
5/16 |
.3125 |
45 |
35 |
| 3/8" - 24 |
Q |
.332 |
50 |
35 |
| 7/16" - 14 |
U |
.368 |
70 |
55 |
| 7/16" - 20 |
25/64 |
.3906 |
80 |
60 |
| 1/2" - 13 |
27/64 |
.4219 |
110 |
80 |
| 1/2" - 20 |
29/64 |
.4531 |
120 |
90 |
| 9/16" - 12 |
31/64 |
.4844 |
150 |
110 |
| 9/16" - 18 |
33/64 |
.5156 |
170 |
130 |
| 5/8" - 11 |
17/32 |
.5312 |
220 |
170 |
| 5/8" - 18 |
37/64 |
.5781 |
240 |
180 |
| 3/4" - 10 |
21/32 |
.6562 |
380 |
280 |
| 3/4" - 16 |
11/16 |
.6875 |
420 |
320 |
| 7/8" - 9 |
49/64 |
.7656 |
600 |
460 |
| 7/8" - 14 |
13/16 |
.8125 |
660 |
500 |
| 1" - 8 |
7/8 |
.875 |
900 |
680 |
| 1" - 12 |
59/64 |
.9219 |
1000 |
740 |
| 1" - 14 |
15/16 |
.9375 |
1020 |
760 |
Lubricated Includes: Lubricants
- Plating - Hardened Washers
Tap Drills: Allow Approximately 75% Full Thread |
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