TAPPING SCREWS
INDENTED HEX WASHER HEAD SLOTTED
HEAD DIMENSIONS
Nominal Size Width Across Flats Width Across Corners Head Height Diameter of Washer Thickness of Washer Width of Slot Depth of Slot
Max. Min. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max.
4 .187 .181 .202 .060 .049 .243 .225 .019 .011 .039 .031 .042 .025
5 .187 .181 .202 .070 .058 .260 .240 .0.25 .015 .043 .035 .049 .030
6 .250 .244 .272 .093 .080 .328 .302 .0.25 .015 .048 .039 .053 .033
7 .250 .244 .272 .093 .080 .328 .302 .029 .017 .048 .039 .062 .040
8 .250 .244 .272 .110 .096 .348 .322 .031 .019 .054 .045 .074 .052
10 .312 .305 .340 .120 .105 .414 .384 .031 .019 .060 .050 .080 .057
12 .312 .305 .340 .155 .139 .432 .398 .039 .022 .067 .056 .103 .077
14 .375 .367 .409 .190 .172 .520 .480 .050 .030 .075 .064 .111 .083
1/4 .375 .367 .409 .190 .172 .520 .480 .050 .030 .075 .064 .111 .083
5/16 .500 .489 .545 .230 .208 .676 .624 .055 .035 .084 .072 .134 .100
3/8 .562 .551 .614 .295 .270 .780 .720 .063 .037 .094 .081 .168 .131