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HEX HEAD SELF TAPPING SCREWS
Head Dimensions




Head Dimensions for Hex Head Self Tapping Screws - ANSI B18.6.4
Nominal
Size		 A W H F U J T
Width
Across Flats		 Width
Across
Corners		 Head
Height		 Washer
Diameter		 Washer
Thickness		 Slot Width Slot Depth
Max Min Min Max Min Max Min Max Min Max Min Max Min
4 .188 .181 .202 .060 .049 .243 .225 .019 .011 .039 .031 .036 .025
6 .250 .244 .272 .093 .080 .328 .302 .025 .015 .048 .039 .046 .033
7 .250 .244 .272 .093 .080 .328 .302 .029 .017 .048 .039 .054 .040
8 .250 .244 .272 .110 .096 .348 .322 .031 .019 .054 .045 .066 .052
10 .312 .305 .340 .120 .105 .414 .384 .031 .019 .060 .050 .072 .057
12 .312 .305 .340 .155 .139 .432 .398 .039 .022 .067 .056 .093 .077
14 .375 .367 .409 .190 .172 .520 .480 .050 .030 .075 .064 .101 .083
1/4 .375 .367 .409 .190 .172 .520 .480 .050 .030 .075 .064 .101 .083
5/16 .500 .489 .545 .230 .208 .676 .624 .055 .035 .084 .072 .122 .100
3/8 .562 .551 .614 .295 .270 .780 .720 .063 .037 .094 .081 .156 .131

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Smith Fastener Company, A California Corporation - 3613 East Florence Avenue, Bell, California, 90201 - Phone: ( 323 ) 587-0382 - FAX: ( 323 ) 587-8712 - E-mail: sales@smithfast.com - Copyright © 2000 by Smith Fastener Company - Last updated: May 19th, 2006 - http://www.smithfast.com/hextapping.htm