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BINDING HEAD MACHINE SCREW
Head Dimensions
Slotted Undercut Binding Head Machine Screws Phillips Binding Head Machine Screws



Phillips Binding Head Machine Screws - ANSI B18.6.3 - 1998
Nominal
Size		 A O F M G N Phillips
Driver
Size
Head
Diameter		 Total Head
Height		 Head Oval
Height		 Recess
Diameter		 Recess
Depth		 Recess
Width
Max Min Max Min Max Min Max Min Max Min Min
2 .181 .171 .050 .043 .018 .013 .100 .087 .058 .041 .017 1
4 .235 .223 .068 .061 .025 .018 .118 .105 .077 .059 .017 1
6 .290 .275 .087 .078 .032 .024 .160 .147 .088 .064 .026 2
8 .344 .326 .105 .095 .039 .029 .186 .173 .114 .090 .028 2
10 .399 .378 .123 .112 .045 .034 .205 .192 .134 .109 .029 2
1/4 .525 .498 .165 .152 .061 .046 .281 .268 .164 .140 .046 3




Head Dimensions for Slotted Undercut Binding Head Machine Screws - B18.6.3
Nominal
Size		 A F O J T U X
Head
Diameter		 Head Height Slot Width Slot Depth Dimensions of Undercut
Oval Height Total Height Diameter Depth
Max Min Max Min Max Min Max Min Max Min Max Min Max Min
2 .181 .171 .018 .013 .050 .043 .031 .023 .030 .020 .141 .124 .010 .005
3 .208 .197 .022 .016 .059 .052 .035 .027 .036 .025 .162 .143 .011 .006
4 .235 .223 .025 .018 .068 .061 .039 .031 .042 .030 .184 .161 .012 .007
5 .263 .249 .029 .021 .078 .069 .043 .035 .048 .035 .205 .180 .014 .009
6 .290 .275 .032 .024 .087 .078 .048 .039 .053 .040 .226 .199 .015 .010
8 .344 .326 .039 .029 .105 .095 .054 .045 .065 .050 .269 .236 .017 .012
10 .399 .378 .045 .034 .123 .112 .060 .050 .077 .060 .312 .274 .020 .015
12 .454 .430 .052 .039 .141 .130 .067 .056 .089 .070 .354 .311 .023 .018
1/4 .525 .498 .061 .046 .165 .152 .075 .064 .105 .084 .410 .360 .026 .021

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