Hex Head Machine Screws & Hex Washer Heads Machine Screws: Size Chart & Specifications

Hex Heads and Hex Washer Heads for Machine Screws Drawing

 

Hex Head and Hex Washer Head Machine Screw Dimensions

Nominal
Size

 D W H F U J T
Width Across
Flats		 Width
Across
Corners		 Height of Hand 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
2 .125 .120 .134 .050 .040 .166 .154 .016 .010 - - - -
4 .188 .181 .202 .060 .049 .243 .225 .019 .011 .039 .031 .042 .025
5 .188 .181 .202 .070 .058 .260 .240 .025 .015 .043 .035 .049 .030
6 .250 .244 .272 .093 .080 .328 .302 .025 .015 .048 .039 .053 .033
8 .250 .244 .272 .110 .096 .348 .322 .031 .019 .054 .045 .074 .052
8 .312 .305 .340 .120 .105 .414 .384 .031 .019 .060 .050 .080 .057
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
1/4 .375 .367 .409 .190 .172 .520 .480 .050 .030 .075 .064 .111 .083
1/4 .438 .428 .484 .188 .150 .618 .574 .055 .030  -  - - -
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
1/2 .750 .735 .820 .400 .367 1.040 .960 .085 .050 .106 .091 .195 .155