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Fastener>> IFI Fastener >> ASME B18.6.3 Slotted Close Tolerance 100-deg Flat Countersunk Head Screws
ASME B18.6.3 Slotted Close Tolerance 100-deg Flat Countersunk Head Screws (Machine Screws Only)
Nominal Size or Basic Screw Diameter |
Head Diameter, A |
Head Height H, |
Slot Width, J |
Slot Depth, T |
Protrusion Above Gaging Diameter, F |
Gaging Diameter, G |
|||||
Max. |
Min. |
Ref. |
Max. |
Min. |
Max. |
Min. |
Max. |
Min. |
|||
4 |
0.1120 |
0.212 |
0.188 |
0.049 |
0.039 |
0.031 |
0.024 |
0.017 |
0.025 |
0.019 |
0.167 |
6 |
0.1380 |
0.262 |
0.235 |
0.060 |
0.048 |
0.039 |
0.030 |
0.022 |
0.028 |
0.021 |
0.214 |
8 |
0.1640 |
0.312 |
0.282 |
0.072 |
0.054 |
0.045 |
0.036 |
0.027 |
0.031 |
0.023 |
0.261 |
10 |
0.1900 |
0.362 |
0.329 |
0.083 |
0.060 |
0.050 |
0.042 |
0.031 |
0.034 |
0.026 |
0.307 |
1/4 |
0.2500 |
0.477 |
0.437 |
0.110 |
0.075 |
0.064 |
0.055 |
0.042 |
0.040 |
0.031 |
0.415 |
5/16 |
0.3125 |
0.597 |
0.550 |
0.138 |
0.084 |
0.072 |
0.069 |
0.053 |
0.047 |
0.037 |
0.526 |
3/8 |
0.3750 |
0.717 |
0.662 |
0.165 |
0.094 |
0.081 |
0.083 |
0.065 |
0.053 |
0.042 |
0.638 |
7/16 |
0.4375 |
0.837 |
0.774 |
0.193 |
0.094 |
0.081 |
0.097 |
0.076 |
0.060 |
0.047 |
0.750 |
1/2 |
0.5000 |
0.957 |
0.887 |
0.221 |
0.106 |
0.091 |
0.111 |
0.088 |
0.066 |
0.053 |
0.862 |
9/16 |
0.5625 |
1.077 |
1.000 |
0.249 |
0.118 |
0.102 |
0.125 |
0.099 |
0.073 |
0.058 |
0.974 |
5/8 |
0.6250 |
1.197 |
1.112 |
0.276 |
0.133 |
0.116 |
0.139 |
0.111 |
0.080 |
0.063 |
1.086 |
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