MACHINE SCREWS
FILLISTER 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 .140 .124 .062 .053 .083 .066 .031 .023 .037 .025
3/48 .161 .145 .070 .061 .095 .077 .035 .027 .043 .030
4/40 .183 .166 .079 .069 .107 .088 .039 .031 .048 .035
5/40 .205 .187 .088 .078 .120 .100 .043 .035 .054 .040
6/32 .226 .208 .096 .086 .132 .111 .048 .039 .060 .045
8/32 .270 .250 .113 .102 .156 .133 .054 .045 .071 .054
10/24 .313 .292 .130 .118 .180 .156 .060 .050 .083 .064
10/32 .313 .292 .130 .118 .180 .156 .060 .050 .083 .064
12/24 .357 .334 .148 .134 .205 .178 .067 .056 .094 .074
1/4 .414 .389 .170 .155 .237 .207 .075 .064 .109 .087
5/16 .518 .490 .211 .194 .295 .262 .084 .072 .137 .110
3/8 .622 .590 .253 .233 .355 .315 .094 .081 .164 .133