STAINLESS STEEL HEX CAP SCREWS (FINISHED HEX BOLTS)

 

 

ANSIB18.2.1–1981
Nominal Size
1 or Basic, Product
Diameter
D F G H J L Y
Body Diameter Width Across Flats Width Across,orners Height Wrenching,Height Thread
Length forScrew Lengths
Transition
Thread
Lengths
6 in, &Shorter Over 6 in.
Max Min Basic Max Min Max Min Basic Max Min Min Basic Basic Max
1/4 0.2500 0.2500 0.2450 7/16 0.438 0.428 0.505 0.488 5/32 0.163 0.150 0.106 0.750 1.000 0.250
5/16 0.3125 0.3125 0.3065 1/2 0.500 0.489 0.577 0.557 13/64 0.211 0.195 0.140 0.875 1.125 0.278
3/8 0.3750 0.3750 0.3690 9/16 0.562 0.551 0.650 0.628 15/64 0.243 0.226 0.160 1.000 1.250 0.312
7/16 0.4375 0.4375 0.4305 5/8 0.625 0.612 0.722 0.698 9/32 0.291 0.272 0.195 1.125 1.375 0.357
1/2 0.5000 0.5000 0.4930 3/4 0.750 0.736 0.866 0.840 5/16 0.323 0.302 0.215 1.250 1.500 0.385
9/16 0.5625 0.5625 0.5545 13/16 0.812 0.798 0.938 0.910 23/64 0.374 0.348 0.250 1.375 1.625 0.417
5/8 0.6250 0.6250 0.6170 15/16 0.938 0.922 1.083 1.051 25/64 0.403 0.378 0.269 1.500 1.750 0.455
3/4 0.7500 0.7500 0.7410 1-1/8 1.125 1.100 1.299 1.254 15/32 0.483 0.455 0.324 1.750 2.000 0.500
7/8 0.8750 0.8750 0.8660 1-5/16 1.312 1.285 1.516 1.465 35/64 0.563 0.531 0.378 2.000 2.250 0.556
1 1.0000 1.0000 0.9900 1-1/2 1.500 1.469 1.732 1.675 39/64 0.627 0.591 0.416 2.250 2.500 0.625
1-1/8 1.1250 1.1250 1.1140 1-11/16 1.688 1.631 1.949 1.859 11/16 0.718 0.658 0.461 2.500 2.750 0.714
1-1/4 1.2500 1.2500 1.2390 1-7/8 1.875 1.812 2.165 2.066 25/32 0.813 0.749 0.530 2.750 3.000 0.714
1-3/8 1.3750 1.3750 1.3630 2-1/16 2.062 1.994 2.382 2.273 27/32 0.878 0.810 0.569 3.000 3.250 0.833
1-1/2 1.5000 1.5000 1.4880 2-1/4 2.230 2.175 2.598 2.480 1-5/16 0.974 0.902 0.640 3.250 3.500 0.833
1-3/4 1.7500 1.7500 1.7380 2-5/8 2.625 2.538 3.031 2.893 1-3/32 1.134 1.054 0.748 3.750 4.000 1.000
2 2.0000 2.0000 1.9880 3 3.000 2.900 3.464 3.306 1-7/32 1.263 1.175 0.825 4.250 4.500 1.111
2-1/4 2.2500 2.2500 2.2380 3-3/8 3.375 3.262 3.897 3.719 1-3/8 1.423 1.327 0.933 4.750 5.000 1.111
2-1/2 2.5000 2.5000 2.4880 3-3/4 3.750 3.625 4.330 4.133 1-17/32 1.583 1.479 1.042 5.250 5.500 1.250
2-3/4 2.7500 2.7500 2.7380 4-1/8 4.125 3.988 4.763 4.546 1-11/16 1.744 1.632 1.151 5.750 6.000 1.250
3 3.0000 3.0000 2.9880 4-1/2 4.500 4.350 5.196 4.959 1-7/8 1.935 1.815 1.290 6.250 6.500 1.250

STAINLESS STEEL HEAVY HEX CAP SCREWS

 

 

ANSIB18.2.1–1981
Nominal
Size
1 or Basic, Product
Diameter
D F G H J L Y
Body Diameter Width Across Flats Width Across,orners Height Wrenching,Height Thread
Length forScrew Lengths
Transition
ThreadLengths
6 in,& Shorter 6 in.
Max Min Basic Max Min Max Min Basic Max Min Min Basic Basic Max
1/2 0.5000 0.5000 0.482 7/8 0.875 0.850 1.010 0.969 5/16 0.323 0.302 0.215 1.250 1.500 0.385
5/8 0.6250 0.6250 0.605 1-1/16 1.062 1.031 1.227 1.175 25/64 0.403 0.378 0.269 1.500 1.750 0.455
3/4 0.7500 0.7500 0.729 1-1/4 1.250 1.212 1.443 1.383 15/32 0.483 0.455 0.324 1.750 2.000 0.500
7/8 0.8750 0.8750 0.852 1-7/16 1.438 1.394 1.660 1.589 35/64 0.563 0.531 0.378 2.000 2.250 0.556
1 1.0000 1.0000 0.976 1-5/8 1.625 1.575 1.876 1.796 39/64 0.627 0.591 0.416 2.250 2.500 0.625
1-1/8 1.1250 1.1250 1.098 1-13/16 1.812 1.756 2.093 2.002 11/16 0.718 0.658 0.461 2.500 2.750 0.714
1-1/4 1.2500 1.2500 1.223 2 2.000 1.938 2.309 2.209 25/32 0.813 0.749 0.530 2.750 3.000 0.714
1-3/8 1.3750 1.3750 1.345 2-3/16 2.188 2.119 2.526 2.416 27/32 0.878 0.810 0.569 3.000 3.250 0.833
1-1/2 1.5000 1.5000 1.470 2-3/8 2.375 2.300 2.742 2.622 15/16 0.974 0.902 0.640 3.250 3.500 0.833
1-3/4 1.7500 1.7500 1.716 2-3/4 2.750 2.662 3.175 3.035 1-3/32 1.134 1.054 0.748 3.750 4.000 1.000
2 2.0000 2.0000 1.964 3-1/8 3.125 3.025 3.608 3.449 1-7/32 1.263 1.175 0.825 4.250 4.500 1.111
2-1/4 2.2500 2.2500 2.214 3-1/2 3.500 3.388 4.041 3.862 1-3/8 1.423 1.327 0.933 4.750 5.000 1.111
2-1/2 2.5000 2.5000 2.461 3-7/8 3.875 3.750 4.474 4.275 1-17/32 1.583 1.479 1.042 5.250 5.500 1.250
2-3/4 2.7500 2.7500 2.711 4-1/4 4.250 4.112 4.907 4.688 1-11/16 1.744 1.632 1.151 5.750 6.000 1.250
3 3.0000 3.0000 2.961 4-5/8 4.625 4.475 5.340 5.102 1-7/8 1.935 1.815 1.290 6.250 6.500 1.250

STAINLESS STEEL HEX NUTS &
HEX JAM NUTS

 

F G H H1 Hex Nuts Specified,
Proof Load
Jam
Nuts All
Strength Levels
Nominal Size1, or Basic Major Diameter of
Thread
Width
Across
Flats
Width Across,Corners Thickness,Hex
Nuts
Thickness,Hex
Jam Nuts
Up to
150,000 psi
150,000
psi and Greater
Basic Max Min Max Min Basic Max Min Basic Max Min Runout
of Bearing
Face, FIR Max
ANSIB18.2.2–1972
1/4 0.2500 7/16 0.438 0.428 0.505 0.488 7/32 0.226 0.212 5/32 0.163 0.150 0.015 0.010 0.015
5/16 0.3125 1/2 0.500 0.489 0.577 0.557 17/64 0.273 0.258 3/16 0.195 0.180 0.016 0.011 0.016
3/8 0.3750 9/16 0.562 0.551 0.650 0.628 21/64 0.337 0.320 7/32 0.227 0.210 0.017 0.012 0.017
7/16 0.4375 11/16 0.688 0.675 0.794 0.768 3/8 0.385 0.365 1/4 0.260 0.240 0.018 0.013 0.018
1/2 0.5000 3/4 0.750 0.736 0.866 0.840 7/16 0.448 0.427 5/16 0.323 0.302 0.019 0.014 0.019
9/16 0.5625 7/8 0.875 0.861 1.010 0.982 31/64 0.496 0.473 5/16 0.324 0.301 0.020 0.015 0.020
5/8 0.6250 15/16 0.938 0.922 1.083 1.051 35/64 0.559 0.535 3/8 0.387 0.363 0.021 0.016 0.021
3/4 0.7500 1-1/8 1.125 1.088 1.299 1.240 41/64 0.665 0.617 27/64 0.446 0.398 0.023 0.018 0.023
7/8 0.8750 1-5/16 1.312 1.269 1.516 1.447 3/4 0.776 0.724 31/64 0.510 0.458 0.025 0.020 0.025
1 1.0000 1-1/2 1.500 1.450 1.732 1.653 55/64 0.887 0.831 35/64 0.575 0.519 0.027 0.022 0.027
1-1/8 1.1250 1-11/16 1.688 1.631 1.949 1.859 31/32 0.999 0.939 39/64 0.639 0.579 0.030 0.025 0.030
1-1/4 1.2500 1-7/8 1.875 1.812 2.165 2.066 1-1/16 1.094 1.030 23/32 0.751 0.687 0.033 0.028 0.033
1-3/8 1.3750 2-1/16 2.062 1.994 2.382 2.273 1-11/64 1.206 1.138 25/32 0.815 0.747 0.036 0.031 0.036
1-1/2 1.5000 2-1/4 2.250 2.175 2.598 2.480 1-9/32 1.317 1.245 27/32 0.880 0.080 0.039 0.034 0.039

STAINLESS STEEL SQUARE &
HEX MACHINE SCREW NUTS

 

 

Nominal Size1,or
Basic,Thread
Diameter
F G G1 H
Width Across Flats                   Width Across Corners Thickness
Square    Hex
Basic Max Min Max Min Max Min Max Min
ANSI B18.6.3 –1972
0 0.0600 5/32 0.156 0.150 0.221 0.206 0.180 0.171 0.050 0.043
1 0.0730 5/32 0.156 0.150 0.221 0.206 0.180 0.171 0.050 0.043
2 0.0860 3/16 0.188 0.180 0.265 0.247 0.217 0.205 0.066 0.057
3 0.0990 3/16 0.188 0.180 0.265 0.247 0.217 0.205 0.066 0.057
4 0.1120 1/4 0.250 0.241 0.354 0.331 0.289 0.275 0.098 0.087
5 0.1250 5/16 0.312 0.302 0.442 0.415 0.361 0.344 0.114 0.102
6 0.1380 5/16 0.312 0.302 0.442 0.415 0.361 0.344 0.114 0.102
8 0.1640 11/32 0.344 0.332 0.486 0.456 0.397 0.378 0.130 1.117
10 0.1900 3/8 0.375 0.362 0.530 0.497 0.433 0.413 0.130 0.117
12 0.2160 7/16 0.438 0.423 0.619 0.581 0.505 0.482 0.161 0.148
1/4 0.2500 7/16 0.438 0.423 0.619 0.581 0.505 0.482 0.193 0.178
5/16 0.3125 9/16 0.562 0.545 0.795 0.748 0.650 0.621 0.225 0.208
3/8 0.3750 5/8 0.625 0.607 0.884 0.833 0.722 0.692 0.257 0.239
1 Where specifying nominal size in decimals, zeros
preceding decimal and in the fourth decimal place
shall be omitted.2 Square machine screw nuts
shall have tops and bottoms flat, without chamfer.
The bearing surface shall be perpendicular to the
axis of the threaded hole pitch cylinder within a
tolerance of 4 deg.
3 Hexagon
machine screw nuts shall have tops flat with
chamfered corners. Diameter of top circle shall be
equal to the maximum width across flats within a
tolerance of minus 15 percent. The bearing surface
shall be perpendicular to the axis of the threaded
hole pitch cylinder within a tolerance of 4 deg.
4 Bottoms of hexagon machine screw nuts are normally
flat, but for special purposes may be chamfered, if
so specified by purchaser.

STAINLESS STEEL HEAVY HEX NUTS &
HEAVY HEX JAM NUTS

F G H H1 Hex Nuts
Specified,
Proof Load
Jam
Nuts All Strength Levels
Nominal Size1, or Basic Major
Diameter of Thread
Width
Across Flats
Width
Across,Corners
Thickness,Hex
Nuts
Thickness,Hex
Jam Nuts
Up
to
150,000 psi
150,000
psi and Greater
Basic Max Min Max Min Basic Max Min Basic Max Min Runout
of Bearing Face, FIR Max
ANSI B18.22–1972
1/4 0.2500 1/2 0.500 0.488 0.577 0.556 15/64 0.250 0.218 11/64 0.188 0.156 0.017 0.011 0.017
5/16 0.3125 9/16 0.562 0.546 0.650 0.622 19/64 0.314 0.280 13/64 0.220 0.186 0.020 0.012 0.020
3/8 0.3750 11/16 0.688 0.669 0.794 0.763 23/64 0.377 0.341 15/64 0.252 0.216 0.021 0.014 0.021
7/16 0.4375 3/4 0.750 0.728 0.866 0.830 27/64 0.441 0.403 17/64 0.285 0.247 0.022 0.015 0.022
1/2 0.5000 7/8 0.875 0.850 1.010 0.969 31/64 0.504 0.464 19/64 0.317 0.277 0.023 0.016 0.023
9/16 0.5625 15/16 0.938 0.909 1.083 1.037 35/64 0.568 0.526 21/64 0.349 0.307 0.024 0.017 0.024
5/8 0.6250 1-1/16 1.062 1.031 1.227 1.175 39/64 0.631 0.587 23/64 0.381 0.337 0.025 0.018 0.025
3/4 0.7500 1-1/4 1.250 1.212 1.443 1.382 47/64 0.758 0.710 27/64 0.446 0.398 0.027 0.020 0.027
7/8 0.8750 1-7/16 1.438 1.394 1.660 1.589 55/64 0.885 0.833 31/64 0.510 0.458 0.029 0.022 0.029
1 1.0000 1-5/8 1.625 1.575 1.876 1.796 63/64 1.012 0.956 35/64 0.575 0.519 0.031 0.024 0.031
1-1/8 1.1250 1-13/16 1.812 1.756 2.093 2.002 1-7/64 1.139 1.079 39/64 0.639 0.579 0.033 0.027 0.033
1-1/4 1.2500 2 2.000 1.938 2.309 2.209 1-7/32 1.251 1.187 23/32 0.751 0.687 0.035 0.030 0.035
1-1/8 1.3750 2-3/16 2.188 2.119 2.526 2.416 1-11/32 1.378 1.310 25/32 0.815 0.747 0.038 0.033 0.038
1-1/2 1.5000 2-3/8 2.375 2.300 2.742 2.622 1-15/32 1.505 1.433 27/32 0.880 0.808 0.041 0.036 0.041
1-5/8 1.6250 2-9/16 2.562 2.481 2.959 2.828 1-19/32 1.632 1.556 29/32 0.944 0.868 0.044 0.038 0.044
1-3/4 1.7500 2-3/4 2.750 2.662 3.175 3.035 1-23/32 1.759 1.679 31/32 1.009 0.929 0.048 0.041 0.048
1-7/8 1.875 2-15/16 2.938 2.844 3.392 3.242 1-27/32 1.886 1.802 1-1/32 1.073 0.989 0.051 0.044 0.051
2 2.000 3-1/8 3.125 3.025 3.608 3.449 1-31/32 2.013 1.925 1-3/32 1.138 1.050 0.055 0.047 0.055
2-1/4 2.2500 3-1/2 3.500 3.388 4.041 3.862 2-13/64 2.251 2.155 1-13/64 1.251 1.155 0.061 0.052 0.061
2-1/2 2.5000 3-7/8 3.875 3.750 4.474 4.275 2-29/64 2.505 2.401 1-29/64 1.505 1.401 0.068 0.058 0.068
2-3/4 2.7500 4-1/4 4.250 4.112 4.907 4.688 2-45/64 2.759 2.647 1-37/64 1.634 1.522 0.074 0.064 0.074
3 3.0000 4-5/8 4.625 4.475 5.340 5.102 2-61/64 3.013 2.893 1-45/64 1.763 1.643 0.081 0.070 0.081
3-1/4 3.2500 5 5.000 4.838 5.774 5.515 3-3/16 3.252 3.124 1-13/16 1.876 1.748 0.087 0.075 0.087
3-1/2 3.5000 5-3/8 5.375 5.200 6.207 5.928 3-7/16 3.506 3.370 1-15/16 2.006 1.870 0.094 0.081 0.094
3-3/4 3.7500 5-3/4 5.750 5.562 6.640 6.341 3-11/16 3.760 3.616 2-1/16 2.134 1.990 0.100 0.087 0.100
4 4.0000 6-1/8 6.125 5.925 7.073 6.755 3-15/16 4.014 3.862 2-3/16 2.264 2.112 0.107 0.093 0.107

STAINLESS STEEL REGULAR HELICAL SPRING LOCK WASHERS1

 

Nominal Washer Size A B T W
inside Washer Size Outside,Diameter Mean Section,Thickness,( 2,) Section,Width
Max Min Max2 Min Min
 
NO.2 0.086 0.094 0.088 0.172 0.020 0.035
NO.3 0.099 0.107 0.101 0.195 0.025 0.040
NO.4 0.112 0.120 0.114 0.209 0.025 0.040
NO.5 0.125 0.133 0.127 0.236 0.031 0.047
NO.6 0.138 0.148 0.141 0.250 0.031 0.047
NO.8 0.164 0.174 0.167 0.293 0.040 0.055
NO.10 0.190 0.200 0.193 0.334 0.047 0.062
NO.12 0.216 0.227 0.220 0.377 0.056 0.070
1/4 0.250 0.262 0.254 0.489 0.062 0.109
5/16 0.312 0.326 0.317 0.586 0.078 0.125
3/8 0.375 0.390 0.380 0.683 0.094 0.141
7/16 0.438 0.455 0.443 0.779 0.109 0.156
1/2 0.500 0.518 0.506 0.873 0.125 0.171
9/16 0.562 0.582 0.570 0.971 0.141 0.188
5/8 0.625 0.650 0.635 1.079 0.156 0.203
13/16 0.688 0.713 0.698 1.176 0.172 0.219
3/4 0.750 0.775 0.760 1.271 0.188 0.234
11/16 0.812 0.843 0.824 1.367 0.200 0.250
7/8 0.875 0.905 0.887 1.464 0.219 0.266
15/16 0.938 0.970 0.950 1.560 0.234 0.281
1 1.000 1.042 1.017 1.661 0.250 0.297
1-1/16 1.062 1.107 1.080 1.756 0.266 0.312
1-1/8 1.125 1.172 1.144 1.853 0.281 0.328
1-3/16 1.188 1.237 1.208 1.950 0.297 0.344
1-1/4 1.250 1.302 1.271 2.045 0.312 0.359
1-5/16 1.312 1.366 1.334 2.141 0.328 0.375
1-3/8 1.375 1.432 1.398 2.239 0.344 0.391
1-7/16 1.438 1.497 1.462 2.334 0.359 0.406
1-1/2 1.500 1.561 1.525 2.430 0.375 0.422
1Formerly designated Medium Helical Spring Lock Washers. 2The maximum outside diameters specified allow for
commercial tolerances on cold drawn wire.
ANSI B18.21.1–1972

STAINLESS STEEL HEXAGON &
SPLINE SOCKET HEAD CAP SCREWS (1960 SERIES)

 

Nominal
Size or Basic Screw Diameter
D A H S M J T G K
Body,Diameter Head Diameter Head Height Head
Side Height
Spline
Socket Size
Hexagon,Sprocket
Size
Key Engage-
ment
Wall
Thick- ness
Chamfer
or Radius
Max Min Max Min Max Min Min Nom Nom Min Min Max
ANSIASME B18.3–1982
0 0.0600 0.0600 0.5680 0.096 0.091 0.060 0.057 0.054 0.060 0.050 0.025 0.020 0.003
1 0.0730 0.0730 0.0695 0.118 0.112 0.073 0.070 0.066 0.072 1/16 0.062 0.031 0.025 0.003
2 0.0860 0.0860 0.0822 0.140 0.134 0.086 0.083 0.077 0.096 5/64 0.078 0.038 0.029 0.003
3 0.0990 0.0990 0.0949 0.161 0.154 0.099 0.095 0.089 0.096 5/64 0.078 0.044 0.034 0.003
4 0.1120 0.1120 0.1075 0.183 0.176 0.112 0.108 0.101 0.111 3/32 0.094 0.051 0.038 0.005
5 0.1250 0.1250 0.1202 0.205 0.198 0.125 0.121 0.112 0.111 3/32 0.094 0.057 0.043 0.005
6 0.1380 0.1380 0.1329 0.226 0.218 0.138 0.134 0.124 0.133 7/64 0.109 0.064 0.047 0.005
8 0.1640 0.1640 0.1585 0.270 0.262 0.164 0.159 0.148 0.168 9/64 0.141 0.077 0.056 0.005
10 0.1900 0.1900 0.1840 0.312 0.303 0.190 0.185 0.171 0.183 5/32 0.156 0.090 0.065 0.005
1/4 0.2500 0.2500 0.2435 0.375 0.365 0.250 0.244 0.225 0.216 3/16 0.188 0.120 0.095 0.008
5/16 0.3125 0.3125 0.3053 0.469 0.457 0.312 0.306 0.281 0.291 1/4 0.250 0.151 0.119 0.008
3/8 0.3750 0.3750 0.3678 0.562 0.550 0.375 0.368 0.337 0.372 5/16 0.312 0.182 0.143 0.008
7/16 0.4375 0.4375 0.4294 0.656 0.642 0.438 0.430 0.394 0.454 3/8 0.375 0.213 0.166 0.010
1/2 0.5000 0.5000 0.4919 0.750 0.735 0.500 0.492 0.450 0.454 3/8 0.375 0.245 0.190 0.010
5/8 0.6250 0.6250 0.6163 0.938 0.921 0.625 0.616 0.562 0.595 1/2 0.500 0.307 0.238 0.010
3/4 0.7500 0.7500 0.7406 1.125 1.107 0.750 0.740 0.675 0.620 5/8 0.625 0.370 0.285 0.010
7/8 0.8750 0.8750 0.8647 1.312 1.293 0.875 0.864 0.787 0.698 3/4 0.750 0.432 0.333 0.015
1 1.0000 1.0000 0.9886 1.500 1.479 1.000 0.988 0.900 0.790 3/4 0.750 0.495 0.380 0.015
1-1/8 1.1250 1.1250 1.1086 1.688 1.665 1.125 1.111 1.012 7/8 0.875 0.557 0.428 0.015
1-1/4 1.2500 1.2500 1.2336 1.875 1.852 1.250 1.236 1.125 7/8 0.875 0.620 0.475 0.015
1-3/8 1.3750 1.3750 1.3568 2.062 2.038 1.375 1.360 1.237 1 1.000 0.682 0.523 0.015
1-1/2 1.5000 1.5000 1.4818 2.250 2.224 1.500 1.485 1.350 1 1.000 0.745 0.570 0.015
1-3/4 1.7500 1.7500 1.7295 2.625 2.597 1.750 1.734 1.575 1-1/4 1.250 0.870 0.665 0.015
2 2.0000 2.0000 1.9780 3.000 2.970 2.000 1.983 1.800 1-1/2 1.500 0.995 0.760 0.015
2-1/4 2.2500 2.2500 2.2280 3.375 3.344 2.250 2.232 2.025 1-3/4 1.750 1.120 0.855 0.031
2-1/2 2.5000 2.5000 2.4762 3.750 3.717 2.500 2.481 2.250 1-3/4 1.750 1.245 0.950 0.031
2-3/4 2.7500 2.7500 2.7262 4.125 4.090 2.750 2.730 2.475 2 2.000 1.370 1.045 0.031
3 3.0000 3.0000 2.9762 4.500 4.464 3.000 2.979 2.700 2-1/4 2.250 1.495 1.140 0.031
3-1/4 3.2500 3.2500 3.2262 4.875 4.837 3.250 3.228 2.925 2-1/4 2.250 1.620 1.235 0.031
3-1/2 3.5000 3.5000 3.4762 5.250 5.211 3.500 3.478 3.150 2-3/4 2.750 1.745 1.330 0.031
3-3/4 3.7500 3.7500 3.7262 5.625 5.584 3.750 3.727 3.375 2-3/4 2.750 1.870 1.425 0.031
4 4.0000 4.0000 3.9762 6.000 5.958 4.000 3.976 3.600 3 3.000 1.995 1.520 0.031

 

STAINLESS STEEL HEXAGON & SPLINE SOCKET SET SCREWS

Nominal
Size or Basic Screw Diameter
J M T C R Y
Hexagon,Socket Size Spline
Socket Size
Min
Key Engagement to Develop Functional Capability
of Key
Cup and Flat,Point Diameters Oval Point
Radius
Cone Point
Angle90º
± 2º,For These Nominal,Lengths
or
Longer:118º ± 2º,For
Shorter,Nominal
Lengths
Nom Nom Hex Socket
T,Min
Spline
Socket T Min
Max Min Basic
ANSIASME
B18.3–1982
0 0.06 0.028 0.033 0.05 0.026 0.033 0.027 0.045 5/64
1 0.073 0.035 0.033 0.06 0.035 0.04 0.033 0.055 3/32
2 0.086 0.035 0.048 0.06 0.04 0.047 0.039 0.064 7/64
3 0.099 0.05 0.048 0.07 0.04 0.054 0.045 0.074 1/8
4 0.112 0.05 0.06 0.07 0.045 0.061 0.051 0.084 5/32
5 0.125 1/16 0.062 0.072 0.08 0.055 0.067 0.057 0.094 3/16
6 0.138 1/16 0.062 0.072 0.08 0.055 0.074 0.064 0.104 3/16
8 0.164 5/64 0.078 0.096 0.09 0.08 0.087 0.076 0.123 1/4
10 0.19 3/32 0.094 0.111 0.1 0.08 0.102 0.088 0.142 1/4
1/4 0.25 1/8 0.125 0.145 0.125 0.125 0.132 0.118 0.188 5/16
5/16 0.3125 5/32 0.156 0.183 0.156 0.156 0.172 0.156 0.234 3/8
3/8 0.375 3/16 0.188 0.216 0.188 0.188 0.212 0.194 0.281 7/16
7/16 0.4375 7/32 0.219 0.251 0.219 0.219 0.252 0.232 0.328 1/2
1/2 0.5 1/4 0.25 0.291 0.25 0.25 0.291 0.27 0.375 9/16
5/8 0.625 5/16 0.312 0.372 0.312 0.312 0.371 0.347 0.469 3/4
3/4 0.75 3/8 0.375 0.454 0.375 0.375 0.45 0.425 0.562 7/8
7/8 0.875 1/2 0.5 0.595 0.5 0.5 0.53 0.502 0.656 1
1 1 9/16 0.562 0.562 0.609 0.579 0.75 1-1/8
1-1/8 1.125 9/16 0.562 0.562 0.689 0.655 0.844 1-1/4
1-1/4 1.25 5/8 0.625 0.625 0.767 0.733 0.938 1-1/2
1-3/8 1.375 5/8 0.625 0.625 0.848 0.808 1.031 1-5/8
1-1/2 1.5 3/4 0.75 0.75 0.926 0.886 1.125 1-3/4
1-3/4 1.75 1 1 1 1.086 1.039 1.312 2
2 2 1 1 1 1.244 1.193 1.5 2-1/4

STAINLESS STEEL ROUND HEAD SQUARE NECK BOLTS (CARRIAGE BOLTS)

 

Nominal Size1,or Basic,Bolt
Diameter
F A H O P Q R
Body Diameter Head
Diameter
Head
Height
Square Width Square Depth Corner
Radius on Square
Fillet,Radius
Max Min Max Min Max Min Max Min Max Min Max Max2
ANSI B18.5 -1978
NO.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
1Where specifying nominal size in decimals, zeros
preceding decimal and in the fourth decimal place shall
be omitted.
2The minimum radius is one
half of the value shown.
ANSI B18.5 -1978

STAINLESS STEEL HEX LAG SCREWS

Nominal Size1,or
Basic,Product Diameter
E F G H S R
Body
or,Shoulder Diameter
Width
Across Flats
Width
Across,Corners
Height Shoulder,Length Radius of Fillet
Max Min Basic Max Min Max Min Basic Max Min Min Max Min
ANSIB18.21–1981
NO.10 0.1900 0.199 0.178 9/32 0.281 0.271 0.323 0.309 1/8 0.140 0.110 0.094 0.03 0.01
1/4 0.2500 0.260 0.237 7/16 0.438 0.425 0.505 0.484 11/64 0.188 0.150 0.094 0.03 0.01
5/16 0.3125 0.324 0.298 1/2 0.500 0.484 0.577 0.552 7/32 0.235 0.195 0.125 0.03 0.01
3/8 0.3750 0.388 0.360 9/16 0.562 0.544 0.650 0.620 1/4 0.268 0.226 0.125 0.03 0.01
7/16 0.4375 0.452 0.421 5/8 0.625 0.603 0.722 0.687 19/64 0.316 0.272 0.156 0.03 0.01
1/2 0.5000 0.515 0.482 3/4 0.750 0.725 0.866 0.826 11/32 0.364 0.302 0.156 0.03 0.01
5/8 0.6250 0.642 0.605 1-15/16 0.938 0.906 1.083 1.033 27/64 0.444 0.378 0.312 0.06 0.02
3/4 0.7500 0.768 0.729 1-1/8 1.125 1.088 1.299 1.240 1/2 0.524 0.455 0.375 0.06 0.02
7/8 0.8750 0.895 0.852 1-5/16 1.312 1.269 1.516 1.447 37/64 0.604 0.531 0.375 0.06 0.02
1 1.0000 1.022 0.976 1-1/2 1.500 1.450 1.732 1.653 43/64 0.700 0.591 0.625 0.09 0.03
1-1/8 1.1250 1.149 1.098 1-11/16 1.688 1.631 1.949 1.859 3/4 0.780 0.658 0.625 0.09 0.03
1-1/4 1.2500 1.277 1.223 1-7/8 1.875 1.812 2.165 2.066 27/32 0.876 0.749 0.625 0.09 0.03

STAINLESS STEEL SLOTTED FLAT COUNTERSUNK HEAD MACHINE SCREWS

Nominal Size1,or
Basic,Bolt Diameter
L2 A H2 J T F4 G4
These
Lengths or Shorter are Undercoat
Head Diameter Head,Height,Ref Slot Width Slot Depth Protrusion Above
Gaging,Diameter
Gaging,Diameter
Max Edge Sharp Min. EdgeRounded or
Flat
Max Min Max Min Max Min
ANSI B18.6.3
-1972
0000 0.0210 0.043 0.037 0.011 0.008 0.004 0.007 0.003 * * *
000 0.0340 0.064 0.058 0.016 0.011 0.007 0.009 0.005 * * *
00 0.0470 0.093 0.085 0.028 0.017 0.010 0.014 0.009 * * *
0 0.0600 1/8 0.119 0.099 0.035 0.023 0.016 0.015 0.010 0.026 0.016 0.078
1 0.0730 1/8 0.146 0.123 0.043 0.026 0.019 0.019 0.012 0.028 0.016 0.101
2 0.0860 1/8 0.172 0.147 0.051 0.031 0.023 0.023 0.015 0.029 0.017 0.124
3 0.0990 1/8 0.199 0.171 0.059 0.035 0.027 0.027 0.017 0.031 0.018 0.148
4 0.1120 3/16 0.225 0.195 0.067 0.039 0.031 0.030 0.020 0.032 0.019 0.172
5 0.1250 3/16 0.252 0.220 0.075 0.043 0.035 0.034 0.022 0.034 0.020 0.196
6 0.1380 3/16 0.279 0.244 0.083 0.048 0.039 0.038 0.024 0.036 0.021 0.220
8 0.1640 1/4 0.332 0.292 0.100 0.054 0.045 0.045 0.029 0.039 0.023 0.267
10 0.1900 5/16 0.385 0.340 0.116 0.060 0.050 0.053 0.034 0.042 0.025 0.313
12 0.2160 3/8 0.438 0.389 0.132 0.067 0.056 0.060 0.039 0.045 0.027 0.362
1/4 0.2500 7/16 0.507 0.452 0.153 0.075 0.064 0.070 0.046 0.050 0.029 0.424
5/16 0.3125 1/2 0.635 0.568 0.191 0.084 0.072 0.088 0.058 0.057 0.034 0.539
3/8 0.3750 9/16 0.762 0.685 0.230 0.094 0.081 0.106 0.070 0.065 0.039 0.653
7/16 0.4375 5/8 0.812 0.723 0.223 0.094 0.081 0.103 0.066 0.073 0.044 0.690
1/2 0.5000 3/4 0.875 0.775 0.223 0.106 0.091 0.103 0.065 0.081 0.049 0.739
9/16 0.5625 1.000 0.889 0.260 0.118 0.102 0.120 0.077 0.089 0.053 0.851
5/8 0.6250 1.125 1.002 0.298 0.133 0.116 0.137 0.088 0.097 0.058 0.962
3/4 0.7500 1.375 1.230 0.372 0.149 0.131 0.171 0.111 0.112 0.067 1.186
1Where specifying nominal size in decimals, zeros
preceding decimal and in the fourth decimal place
shall be omitted.
*Not practical to
gage.
ANSI B18.6.3–1972

STAINLESS STEEL SLOTTED PAN HEAD MACHINE SCREWS

 

Nominal Size1,orBasic,Product Diameter A H R J T
    Head Diameter Head Height Head Radius      Slot Width     Slot Depth
Max Min Max Min Max Max Min Max Min
ANSI B18.6.3–1972
1Where specifying nominal
size in decimals, zeros preceding decimal and in the
fourth decimal place shall be omitted.
0000 0.0210 0.042 0.036 0.016 0.010 0.007 0.008 0.004 0.008 0.004
000 0.0340 0.066 0.060 0.023 0.017 0.010 0.012 0.008 0.012 0.008
00 0.0470 0.090 0.082 0.032 0.025 0.015 0.017 0.010 0.016 0.010
0 0.0600 0.116 0.104 0.039 0.031 0.020 0.023 0.016 0.022 0.014
1 0.0730 0.142 0.130 0.046 0.038 0.025 0.026 0.019 0.027 0.018
2 0.0860 0.167 0.155 0.053 0.045 0.035 0.031 0.023 0.031 0.022
3 0.0990 0.193 0.180 0.060 0.051 0.037 0.035 0.027 0.036 0.026
4 0.1120 0.219 0.205 0.068 0.058 0.042 0.039 0.031 0.040 0.030
5 0.1250 0.245 0.231 0.075 0.065 0.044 0.043 0.035 0.045 0.034
6 0.1380 0.270 0.256 0.082 0.072 0.046 0.048 0.039 0.050 0.037
8 0.1640 0.322 0.306 0.096 0.085 0.052 0.054 0.045 0.058 0.045
10 0.1900 0.373 0.357 0.110 0.099 0.061 0.060 0.050 0.068 0.053
12 0.2160 0.425 0.407 0.125 0.112 0.078 0.067 0.056 0.077 0.061
1/4 0.2500 0.492 0.473 0.144 0.130 0.087 0.075 0.064 0.087 0.070
5/16 0.3215 0.615 0.594 0.178 0.162 0.099 0.084 0.072 0.106 0.085
3/8 0.3750 0.740 0.716 0.212 0.195 0.143 0.094 0.081 0.124 0.100
7/16 0.4375 0.863 0.837 0.247 0.228 0.153 0.094 0.081 0.142 0.116
1/2 0.5000 0.987 0.958 0.281 0.260 0.175 0.106 0.091 0.161 0.131
9/16 0.5625 1.041 1.000 0.315 0.293 0.197 0.118 0.102 0.179 0.146
5/8 0.6250 1.172 1.125 0.350 0.325 0.219 0.133 0.116 0.197 0.162
3/4 0.7500 1.435 1.375 0.419 0.390 0.263 0.149 0.131 0.234 0.192