ASME B18.3 Drilled Hexagon Socket Head Cap Screws
Dimensions of ASME B18.3 Drilled Hexagon Socket Head Cap Screws
Nominal Size or Basic Screw Diameter |
Drilled Hole Dia, U |
Head to Center of Hole, V |
Head to Edge of Hole, W, Min |
Drill Check Plug Dia |
Hole Alignment Check Plug Dia |
Type 1 |
Type 2 |
Number |
Basic |
Max |
Min |
Min |
Basic |
Basic |
4 |
0.1120 |
65 |
0.0350 |
0.040 |
0.026 |
0.008 |
0.030 |
0.033 |
0.025 |
5 |
0.1250 |
65 |
0.0350 |
0.045 |
0.030 |
0.012 |
0.030 |
0.033 |
0.025 |
6 |
0.1380 |
65 |
0.0350 |
0.050 |
0.035 |
0.018 |
0.030 |
0.033 |
0.025 |
8 |
0.1640 |
56 |
0.0465 |
0.060 |
0.040 |
- |
0.035 |
0.044 |
0.030 |
10 |
0.1900 |
56 |
0.0465 |
0.065 |
0.045 |
- |
0.035 |
0.044 |
0.030 |
1/4 |
0.2500 |
56 |
0.0465 |
0.085 |
0.065 |
- |
0.035 |
0.044 |
0.030 |
5/16 |
0.3125 |
56 |
0.0465 |
0.104 |
0.084 |
- |
0.035 |
0.044 |
0.030 |
3/8 |
0.3750 |
52 |
0.0635 |
0.123 |
0.103 |
- |
0.052 |
0.061 |
0.047 |
7/16 |
0.4375 |
52 |
0.0635 |
0.141 |
0.121 |
- |
0.052 |
0.061 |
0.047 |
1/2 |
0.5000 |
52 |
0.0635 |
0.160 |
0.140 |
- |
0.052 |
0.061 |
0.047 |
5/8 |
0.6250 |
52 |
0.0635 |
0.198 |
0.178 |
- |
0.052 |
0.061 |
0.047 |
3/4 |
0.7500 |
42 |
0.0935 |
0.235 |
0.215 |
- |
0.082 |
0.091 |
0.077 |
7/8 |
0.8750 |
42 |
0.0935 |
0.273 |
0.253 |
- |
0.082 |
0.091 |
0.077 |
1 |
1.0000 |
42 |
0.0935 |
0.310 |
0.290 |
- |
0.082 |
0.091 |
0.077 |
1 1/8 |
1.1250 |
31 |
0.1200 |
0.348 |
0.328 |
- |
0.109 |
0.117 |
0.104 |
1 1/4 |
1.2500 |
31 |
0.1200 |
0.385 |
0.365 |
- |
0.109 |
0.117 |
0.104 |
1 3/8 |
1.3750 |
31 |
0.1200 |
0.423 |
0.403 |
- |
0.109 |
0.117 |
0.104 |
1 1/2 |
1.5000 |
31 |
0.1200 |
0.460 |
0.440 |
- |
0.109 |
0.117 |
0.104 |
- All dimensions are in inches