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Weights for ASME B18.6.3 Type 1 Cross Recessed Non Indented Regular and Large Hex Head Machine Screws

Dimensions of ASME B18.6.3 Type 1 Cross Recessed Non Indented Regular and Large Hex Head Machine Screws

Dimensions of ASME B18.6.3 Type 1 Cross Recessed Non Indented Regular and Large Hex Head Machine Screws

Nominal Size or Basic Screw Diameter Regular Head Large Head Head Height, H Recess Diameter, M Recess Depth, T Recess Width, N Driver Size Recess Penetration Gaging Depth Protrusion Beyond Gaging Ring, F, Min
Width Across Flats, A Across Corners, W, Min Width Across Flats, A Across Corners, W, Min
Max Min Max Min Max Min Max Min
8 0.250 0.244 0.272 0.312 0.305 0.340 0.110 0.096 0.183 0.110 0.031 2 0.110 0.087 0.058
10 0.312 0.305 0.340 – – – 0.120 0.105 0.198 0.125 0.032 2 0.125 0.102 0.063
12 0.312 0.305 0.340 0.375 0.367 0.409 0.155 0.139 0.262 0.145 0.035 3 0.139 0.116 0.083
1/4 0.375 0.367 0.409 0.438 0.428 0.477 0.190 0.172 0.277 0.160 0.036 3 0.154 0.131 0.103
5/16 0.500 0.489 0.545 – – – 0.230 0.208 0.359 0.205 0.061 4 0.196 0.174 0.125
3/8 0.562 0.551 0.614 – – – 0.295 0.270 0.387 0.234 0.065 4 0.225 0.203 0.162