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OVAL HEAD MACHINE SCREWS
Head Dimensions
Slotted Oval Head Machine Screws Undercut Slotted Oval Head Machine Screws
Phillips Oval Head Machine Screws Undercut Phillips Oval Head Machine Screws

Head Dimensions for Oval Head Machine Screws - ANSI B18.6.3
Nominal
Size		 A H O J T M R N F G Phillips
Driver
Size
Head
Diameter		 Head Height Slot Dimensions Recess Dimensions Protrusion
Above Gaging
Diameter		 Gaging
Diameter
Side Total Width Depth Dia Depth Width
Max Min Max Max Max Min Max Min Rew Ref Ref Max Min
0 .112 .096 .035 .056 .023 .016 .030 .025 .068 .036 .014 .047 .031 .078 0
1 .137 .120 .043 .068 .026 .019 .038 .031 .070 .039 .015 .053 .035 .101 0
2 .162 .144 .051 .080 .031 .023 .045 .037 .106 .060 .018 .058 .039 .124 1
3 .187 .167 .059 .092 .035 .027 .052 .043 .118 .072 .019 .064 .044 .148 1
4 .212 .191 .067 .104 .039 .031 .059 .049 .130 .086 .019 .069 .048 .172 1
5 .237 .215 .075 .116 .043 .035 .067 .055 .152 .073 .028 .075 .053 .196 2
6 .262 .238 .083 .128 .048 .039 .074 .060 .172 .092 .030 .080 .057 .220 2
8 .312 .285 .100 .152 .054 .045 .088 .072 .186 .107 .031 .091 .066 .267 2
10 .362 .333 .116 .176 .060 .050 .103 .084 .202 .125 .033 .102 .075 .313 2
12 .412 .380 .132 .200 .067 .056 .117 .096 .264 .140 .038 .113 .084 .362 3
1/4 .477 .442 .153 .232 .075 .064 .136 .112 .284 .160 .040 .129 .095 .424 3
5/16 .597 .556 .191 .290 .084 .072 .171 .141 .384 .226 .065 .155 .117 .539 4
3/8 .717 .670 .230 .347 .094 .081 .206 .170 .404 .245 .068 .182 .139 .653 4
7/16 .760 .715 .223 .345 .094 .081 .210 .174 .416 .257 .070 .195 .150 .690 4
1/2 .815 .765 .223 .354 .106 .091 .216 .176 .430 .271 .071 .212 .163 .739 4


Head Dimensions for Undercut Oval Head Machine Screws - ANSI B18.6.3
Nominal
Size		 These
Lengths
or
Shorter
are
Undercut		 A H O J T M R N F G Phillips
Driver
Size
Head Dimensions Slot Dimensions Recess Dimensions Protrusion
Above Gaging
Diameter		 Gaging
Diameter
Diameter Side
Height		 Total
Height		 Width Depth Dia Depth Width
Max Min Max Max Min Max Min Ref Ref Ref Max Min Max Min
0 1/8 .112 .096 .025 .046 .033 .023 .016 .028 .022 .068 .036 .014 .047 .031 .078 0
1 1/8 .137 .120 .031 .056 .042 .026 .019 .034 .027 .070 .039 .015 .053 .035 .101 0
2 1/8 .162 .144 .036 .065 .050 .031 .023 .040 .033 .106 .060 .018 .058 .039 .124 1
3 1/8 .187 .167 .042 .075 .059 .035 .027 .047 .038 .118 .072 .019 .064 .044 .148 1
4 3/16 .212 .191 .047 .084 .067 .039 .031 .053 .043 .130 .086 .019 .069 .048 .172 1
5 3/16 .237 .215 .053 .094 .076 .043 .035 .059 .048 .152 .073 .028 .075 .053 .196 2
6 3/16 .237 .215 .053 .094 .076 .043 .035 .059 .048 .152 .073 .028 .075 .053 .196 2
8 1/4 .312 .285 .070 .123 .101 .054 .045 .078 .064 .186 .107 .031 .091 .066 .267 2
10 5/16 .362 .333 .081 .142 .118 .060 .050 .090 .074 .202 .125 .033 .102 .075 .313 2
12 3/8 .412 .380 .092 .161 .135 .067 .056 .103 .085 .264 .140 .038 .113 .084 .362 3
1/4 7/16 .477 .442 .107 .186 .158 .075 .064 .119 .098 .284 .160 .040 .129 .095 .424 3
5/16 1/2 .597 .556 .134 .232 .198 .084 .072 .149 .124 .374 .214 .064 .155 .117 .539 4
3/8 9/16 .717 .670 .161 .278 .239 .094 .081 .179 .149 .394 .223 .066 .182 .139 .653 4
7/16 5/8 .760 .715 .156 .279 .239 .094 .081 .184 .154 .404 .245 .068 .195 .150 .690 4
1/2 3/4 .815 .765 .156 .288 .244 .106 .091 .204 .169 .416 .257 .070 .212 .136 .739 4

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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 22nd, 2006 - http://www.smithfast.com/ovalhead.htm