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BASIC
SCREW
DIAMETER |
E |
A |
H |
O |
P |
Q |
R |
BODY |
HEAD |
HEAD |
SQUARE |
SQUARE |
RADIUS |
FILLET |
DIAMETER |
DIAMETER |
HEIGHT |
WIDTH |
DEPTH |
SQUARE |
RADIUS |
max |
min |
max |
min |
max |
min |
max |
min |
max |
min |
max |
max |
10 |
0.1900 |
0.199 |
0.182 |
0.469 |
0.438 |
0.114 |
0.094 |
0.199 |
0.185 |
0.125 |
0.094 |
0.031 |
0.031 |
1/4 |
0.2500 |
0.260 |
0.237 |
0.594 |
0.563 |
0.145 |
0.125 |
0.260 |
0.245 |
0.156 |
0.125 |
0.031 |
0.031 |
5/16 |
0.3125 |
0.324 |
0.298 |
0.719 |
0.688 |
0.176 |
0.156 |
0.324 |
0.307 |
0.187 |
0.156 |
0.031 |
0.031 |
3/8 |
0.3750 |
0.388 |
0.360 |
0.844 |
0.782 |
0.208 |
0.188 |
0.388 |
0.368 |
0.219 |
0.188 |
0.047 |
0.031 |
7/16 |
0.4375 |
0.452 |
0.421 |
0.969 |
0.907 |
0.239 |
0.219 |
0.452 |
0.431 |
0.250 |
0.219 |
0.047 |
0.031 |
1/2 |
0.5000 |
0.515 |
0.483 |
1.094 |
1.032 |
0.270 |
0.250 |
0.515 |
0.492 |
0.281 |
0.250 |
0.047 |
0.031 |
5/8 |
0.6250 |
0.642 |
0.605 |
1.344 |
1.219 |
0.344 |
0.313 |
0.642 |
0.616 |
0.344 |
0.313 |
0.078 |
0.062 |
3/4 |
0.7500 |
0.768 |
0.729 |
1.594 |
1.469 |
0.406 |
0.375 |
0.768 |
0.741 |
0.406 |
0.375 |
0.078 |
0.062 |
7/8 |
0.8750 |
0.895 |
0.852 |
1.844 |
1.719 |
0.469 |
0.438 |
0.895 |
0.865 |
0.469 |
0.438 |
0.094 |
0.062 |
1" |
1.0000 |
1.022 |
0.976 |
2.094 |
1.969 |
0.531 |
0.500 |
1.022 |
0.990 |
0.531 |
0.500 |
0.094 |
0.062 |
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Round head carriage bolts are also referred to
as round head square neck carriage bolts. The dimensions listed
above refer only to the standard neck bolts. If the dimensions for
your requirement are similar but do not correspond directly with
those above, you may need a round head short neck bolt. Dimensions
and other information regarding this type of bolt are available
from your sales representative. Step bolts look similar to carriage
bolts. Dimensions vary slightly and are referenced below.
STEP BOLTS
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BASIC
SCREW
DIAMETER |
E |
A |
H |
O |
P |
Q |
R |
BODY |
HEAD |
HEAD |
SQUARE |
SQUARE |
RADIUS |
FILLET |
DIAMETER |
DIAMETER |
HEIGHT |
WIDTH |
DEPTH |
SQUARE |
RADIUS |
max |
min |
max |
min |
max |
min |
max |
min |
max |
min |
max |
max |
10 |
0.1900 |
0.199 |
0.182 |
0.656 |
0.625 |
0.114 |
0.094 |
0.199 |
0.185 |
0.125 |
0.094 |
0.031 |
0.031 |
1/4 |
0.2500 |
0.260 |
0.237 |
0.844 |
0.813 |
0.145 |
0.125 |
0.260 |
0.245 |
0.156 |
0.125 |
0.031 |
0.031 |
5/16 |
0.3125 |
0.324 |
0.298 |
1.031 |
1.000 |
0.176 |
0.156 |
0.324 |
0.307 |
0.187 |
0.156 |
0.031 |
0.031 |
3/8 |
0.3750 |
0.388 |
0.360 |
1.219 |
1.188 |
0.208 |
0.188 |
0.388 |
0.368 |
0.219 |
0.188 |
0.047 |
0.031 |
7/16 |
0.4375 |
0.452 |
0.421 |
1.406 |
1.375 |
0.239 |
0.219 |
0.452 |
0.431 |
0.250 |
0.219 |
0.047 |
0.031 |
1/2 |
0.5000 |
0.515 |
0.483 |
1.594 |
1.563 |
0.270 |
0.250 |
0.515 |
0.492 |
0.281 |
0.250 |
0.047 |
0.031 |
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