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Weights for ASME B18.6.3 Type 3 Square Recessed Undercut Flat Countersunk Head Machine Screws

Dimensions of Type 3 Square Recessed Undercut Flat Countersunk Head Machine Screws

Dimensions of Type 3 Square Recessed Undercut Flat Countersunk Head Machine Screws

Nominal Size or Basic Screw Diameter Length, L Head Diameter, A Head Height, H Recess Across Flats, M Recess Depth, T Recess Size Recess Penetration Gaging Depth Protrusion Above Gaging Diameter, F Gaging Diameter, G
Max Min Max Min Max Min Max Min
4 3/16 0.212 0.191 0.047 0.038 0.050 0.057 00 0.033 0.028 0.032 0.019 0.172
5 3/16 0.237 0.215 0.053 0.043 0.070 0.066 0 0.038 0.028 0.034 0.020 0.196
6 3/16 0.262 0.238 0.059 0.048 0.091 0.070 1SS 0.027 0.017 0.036 0.021 0.220
8 1/4 0.312 0.285 0.070 0.058 0.112 0.091 2SS 0.037 0.027 0.039 0.023 0.267
10 5/16 0.362 0.333 0.081 0.068 0.112 0.091 2SS 0.037 0.027 0.042 0.025 0.313
12 3/8 0.412 0.380 0.092 0.078 0.133 0.138 3SS 0.073 0.063 0.045 0.027 0.362
1/4 7/16 0.477 0.442 0.107 0.092 0.133 0.143 3S 0.080 0.065 0.050 0.029 0.424
5/16 1/2 0.597 0.556 0.134 0.116 0.191 0.194 4R 0.100 0.085 0.057 0.034 0.539
3/8 9/16 0.717 0.670 0.161 0.140 0.191 0.194 4R 0.100 0.085 0.065 0.039 0.653