MACHINE SCREWS
OVAL HEAD SLOT
 HEAD DIMENSIONS ONLY

All Dimensions in Inches
Basic 
Screw
Diameter		 Head Diameter Head Height Slot Width Slot Depth
Side Height Total Height
Max. Min. Max. Min. Max. Min. Max. Min. Max. Min.
2/56 .172 .150 .051 .040 .080 .063 .031 .023 .045 .037
3/48 .199 .175 .059 .048 .092 .073 .035 .027 .052 .043
4/40 .225 .200 .067 .055 .104 .084 .039 .031 .059 .049
5/40 .252 .225 .075 .062 .116 .095 .043 .035 .067 .055
6/32 .279 .249 .083 .069 .128 .105 .048 .039 .074 .060
8/32 .332 .300 .100 .084 .152 .126 .054 .045 .088 .072
10/24 .385 .348 .116 .098 .176 .148 .060 .050 .103 .084
10/32 .385 .348 .116 .098 .176 .148 .060 .050 .103 .084
12/24 .438 .397 .132 .112 .200 .169 .067 .056 .117 .096
1/4 .507 .462 .153 .131 .232 .197 .075 .064 .136 .112
5/16 .635 .581 .191 .165 .290 .249 .084 .072 .171 .141
3/8 .762 .700 .230 .200 .347 .300 .094 .081 .206 .170