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Head Dimensions
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| HEX CAPS - HEAD DIMENSIONS ANSI B18.2.1 |
| Diameter |
1/4 |
5/16 |
3/8 |
7/16 |
1/2 |
9/16 |
5/8 |
3/4 |
7/8 |
1 |
1-1/8 |
1-1/4 |
1-1/2 |
| Maximum Across Flats |
7/16 |
1/2 |
9/16 |
5/8 |
3/4 |
13/16 |
15/16 |
1-1/8 |
1-5/16 |
1-1/2 |
1-11/16 |
1-7/8 |
2-1/4 |
| Head Height |
5/32 |
13/64 |
15/64 |
9/32 |
5/16 |
23/64 |
25/64 |
15/32 |
35/64 |
19/64 |
11/16 |
25/32 |
15/16 |
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| DIMENSIONS - CARRIAGE BOLTS ANSI B18.5 |
| Diameter |
10 |
1/4 |
5/16 |
3/8 |
1/2 |
| Max. Head Diameter |
.469 |
.594 |
.719 |
.844 |
.1094 |
| Max. Head Height |
.114 |
.145 |
.176 |
.208 |
.270 |
| Max Sq. Depth |
.125 |
.156 |
.187 |
.219 |
.281 |
| Max. Sq. Width |
.199 |
.260 |
.324 |
.388 |
.515 |
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| DIMENSIONS - HEX LAG BOLTS ANSI B18.2.1 |
| Diameter |
1/4 |
5/16 |
3/8 |
1/2 |
5/8 |
| Head Diameter Ac. Flats |
7/16 |
1/2 |
9/16 |
3/4 |
15/16 |
| Head Height |
11/64 |
7/32 |
1/4 |
11/32 |
27/64 |
| Threads Per Inch |
10 |
9 |
7 |
6 |
5 |
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| DIMENSIONS - SHOULDER BOLTS ANSI B18.3 |
| Diameter |
10 |
5/16 |
3/8 |
1/2 |
5/8 |
3/4 |
| Max. Shoulder Diameter |
.248 |
.310 |
.373 |
.498 |
.623 |
.748 |
| Max. Head Diameter |
.375 |
.438 |
.562 |
.750 |
.875 |
1.000 |
| Max. Head Height |
.188 |
.219 |
.250 |
.312 |
.375 |
.500 |
| Size of Hex Hole |
.125 |
.156 |
.188 |
.250 |
.312 |
.375 |
| Thread Size |
10/24 |
1/4-20 |
5/16-18 |
3/8-16 |
1/2-13 |
5/8-11 |
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DIMENSIONS -
SQUARE HEAD SET SCREWS ANSI B18.6.2 |
| Diameter |
1/4 |
5/16 |
3/8 |
1/2 |
| Max. Width Ac. Fl. - Head |
.250 |
.312 |
.375 |
.500 |
| Max. Head Height |
.196 |
.245 |
.293 |
.389 |
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| SOCKET HEAD CAP SCREWS - ANSI B18.3 |
| Diameter |
0 |
1 |
2 |
3 |
4 |
5 |
6 |
8 |
10 |
1/4 |
5/16 |
3/8 |
7/16 |
| Maximum Head Diameter |
0.96 |
.118 |
.140 |
.161 |
.183 |
.205 |
.226 |
.270 |
5/16 |
3/8 |
15/32 |
9/16 |
21/32 |
| Maximum Head Height |
.060 |
.073 |
.086 |
.099 |
.112 |
.125 |
.138 |
.164 |
.190 |
1/4 |
5/16 |
3/8 |
7/16 |
| Size of Hex Hole |
.050 |
1/16 |
5/64 |
5/64 |
3/32 |
3/32 |
7/64 |
9/64 |
5/32 |
3/16 |
1/4 |
5/16 |
3/8 |
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SOCKET HEAD CAP SCREWS - ANSI B18.3
(continued...) |
| Diameter |
1/2 |
5/8 |
3/4 |
7/8 |
1 |
| Maximum Head Diameter |
3/4 |
15/16 |
1-1/8 |
1-5/16 |
1-1/2 |
| Maximum Head Height |
1/2 |
5/8 |
3/4 |
7/8 |
1 |
| Size of Hex Hole |
3/8 |
1/2 |
5/8 |
3/4 |
3/4 |
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| SOCKET SET SCREW - ANSI B18.3 |
| Diameter of Screw |
0 |
1 |
2 |
3 |
4 |
5 |
6 |
8 |
10 |
1/4 |
5/16 |
3/8 |
7/16 |
| Size of Hex Hole |
.028 |
.035 |
.035 |
.050 |
.050 |
1/16 |
1/16 |
5/64 |
3/32 |
1/8 |
5/32 |
3/16 |
7/32 |
| Depth of Hex Hole |
.022 |
.028 |
.028 |
.040 |
.040 |
.050 |
.050 |
.062 |
.075 |
.100 |
.125 |
.150 |
.175 |
| Max. Cup. Pt. Dia. |
.033 |
.040 |
.047 |
.054 |
.61 |
.067 |
.074 |
.087 |
.102 |
.132 |
.172 |
.212 |
.252 |
| Cup Pt. Angie |
118° |
118° |
118° |
118° |
118° |
118° |
118° |
118° |
118° |
118° |
118° |
118° |
118° |
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SOCKET SET SCREW - ANSI B18.3
(continued...) |
| Diameter of Screw |
1/2 |
5/8 |
3/4 |
| Size of Hex Hole |
1/4 |
5/16 |
3/8 |
| Depth of Hex Hole |
.200 |
.250 |
.300 |
| Max. Cup. Pt. Dia. |
.291 |
.371 |
.450 |
| Cup Pt. Angie |
118° |
118° |
118° |
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| FLAT AND BUTTON SOCKET CAP SCREWS - ANSI B18.3 |
| Diameter of Screw |
2 |
4 |
5 |
6 |
8 |
10 |
1/4 |
5/16 |
3/8 |
7/16 |
1/2 |
5/8 |
3/4 |
| Flat - Maximum Head Diameter |
.197 |
.255 |
.281 |
.307 |
.359 |
.411 |
.531 |
.656 |
.781 |
.844 |
.937 |
1.188 |
1.438 |
| Flat - Maximum Head Height |
.064 |
.083 |
.090 |
.097 |
.112 |
.127 |
.161 |
.198 |
.234 |
.234 |
.251 |
.324 |
.396 |
| Button - Maximum Head Diameter |
.164 |
.213 |
- |
.262 |
.312 |
.361 |
.437 |
.547 |
.656 |
- |
.875 |
1.000 |
- |
| Button - Maximum Head Height |
.046 |
.059 |
- |
.073 |
.087 |
.101 |
.132 |
.166 |
.199 |
- |
.265 |
.331 |
- |
| Flat and Button - Maximum Size Hex Hole |
.051 |
.0635 |
.0791 |
.0791 |
.0952 |
.1270 |
.1587 |
.1900 |
.2217 |
- |
.3160 |
.3790 |
.5000 |
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| Trimmed and indented hex machine screws, hex and slotted hex washer sheet metal screws |
| Dia. |
4 |
6 |
8 |
10 |
| Max. Across Flats |
.187 |
.250 |
.250 |
.312 |
| Max. Head Height |
.060 |
.093 |
.110 |
.120 |
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Numbers are for general information only. Absolute Stainless Inc. accepts no liabilities for any inconsistencies or inaccuracies.
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