Heavy Hex Head Bolts
| HEAVY HEX CAP SCREWS ASME B18.2.1-1996 |
Nominal
or
Basic
Product
Diameter
|
E |
F |
G |
H |
W |
Lt |
S |
Body Diameter |
Width Across Flats |
Width
Across
Corners |
Head Height |
Wrench
Height |
Thread
Length |
Trans
-ition
Thread
Length
|
6 in. and
shorter
|
Over
6 in. |
Max |
Min |
Max |
Min |
Max |
Min |
Max |
Min |
Min |
Basic |
Basic |
Max |
1/2 |
0.5000 |
0.5000 |
0.482 |
0.875 |
0.850 |
1.010 |
0.969 |
0.323 |
0.302 |
0.215 |
1.250 |
1.500 |
0.385 |
5/8 |
0.6250 |
0.6250 |
0.605 |
1.062 |
1.031 |
1.227 |
1.175 |
0.403 |
0.378 |
0.269 |
1.500 |
1.750 |
0.455 |
3/4 |
0.7500 |
0.7500 |
0.729 |
1.250 |
1.212 |
1.443 |
1.383 |
0.483 |
0.455 |
0.324 |
1.750 |
2.000 |
0.500 |
7/8 |
0.8750 |
0.8750 |
0.852 |
1.438 |
1.394 |
1.660 |
1.589 |
0.563 |
0.531 |
0.378 |
2.000 |
2.250 |
0.556 |
1" |
1.0000 |
1.0000 |
0.976 |
1.625 |
1.575 |
1.876 |
1.796 |
0.627 |
0.591 |
0.416 |
2.250 |
2.500 |
0.625 |
1-1/8 |
1.1250 |
1.1250 |
1.098 |
1.812 |
1.756 |
2.093 |
2.002
|
0.718 |
0.658 |
0.461 |
2.500 |
2.750 |
0.714 |
1-1/4 |
1.2500 |
1.2500 |
1.223 |
2.000 |
1.938 |
2.309 |
2.209 |
0.813 |
0.749 |
0.530 |
2.750 |
3.000 |
0.714 |
1-3/8 |
1.3750 |
1.3750 |
1.345 |
2.188 |
2.119 |
2.526 |
2.416 |
0.878 |
0.810 |
0.569 |
3.000 |
3.250 |
0.833 |
1-1/2 |
1.5000 |
1.5000 |
1.470 |
2.375 |
2.300 |
2.742 |
2.622 |
0.974 |
0.902 |
0.640 |
3.250 |
3.500 |
0.833 |
1-3/4 |
1.7500 |
1.7500 |
1.716 |
2.750 |
2.662 |
3.175 |
3.035 |
1.134 |
1.054 |
0.748 |
3.750 |
4.000 |
1.000 |
2" |
2.0000 |
2.0000 |
1.964 |
3.125 |
3.025 |
3.608 |
3.449 |
1.263 |
1.175 |
0.825 |
4.250 |
4.500 |
1.111 |
2-1/4 |
2.2500 |
2.2500 |
2.214 |
3.500 |
3.388 |
4.041 |
3.862 |
1.423 |
1.327 |
0.933 |
... |
5.000 |
1.111 |
2-1/2 |
2.5000 |
2.5000 |
2.461 |
3.875 |
3.750 |
4.474 |
4.275 |
1.583 |
1.479 |
1.042 |
... |
5.500 |
1.250 |
2-3/4 |
2.7500 |
2.7500 |
2.711 |
4.250 |
4.112 |
4.907 |
4.688 |
1.744 |
1.632 |
1.151 |
... |
6.000 |
1.250 |
3" |
3.0000 |
3.0000 |
2.961 |
4.625 |
4.475 |
5.340 |
5.102 |
1.935 |
1.815 |
1.290 |
... |
6.500 |
1.250 |
| |
| Tolerance on Length |
Nominal
Screw Size |
Nominal Screw Length |
Up to 1 in.,
incl. |
Over 1 in.
to
2-1/2 in., incl.
|
Over 2-1/2 in.
to 4 in., incl. |
Over 4 in. to
6 in., incl. |
|
1/4 to 3/8 |
-0.02 |
-0.03 |
+0.02 |
-0.04 |
+0.04 |
-0.06 |
+0.06 |
-0.10 |
+0.10 |
-0.18 |
7/16 and 1/2 |
-0.02 |
-0.03 |
+0.04 |
-0.06 |
+0.06 |
-0.08 |
+0.08 |
-0.10 |
+0.12 |
-0.18 |
9/16 to 3/4 |
-0.02 |
-0.03 |
+0.06 |
-0.08 |
+0.08 |
-0.10 |
+0.10 |
-0.10 |
+0.14 |
-0.18 |
7/8 and 1 |
.... |
.... |
+0.08 |
-0.10 |
+0.10 |
-0.14 |
+0.12 |
-0.16 |
+0.16 |
-0.20 |
|
.... |
.... |
+0.12 |
-0.12 |
+0.16 |
-0.16 |
+0.18 |
-0.18 |
+0.22 |
-0.22 |
‡Length of a cap screw is measured from the underhead bearing surface to the extreme end of the screw.
**Product standards require the manufacturer’s head marking to appear on the top of all cap screws 1/4” diameter and larger. “X” represents one location such a marking may appear.
|
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