MACHINE SCREWS
TRUSS HEAD SLOT
HEAD DIMENSIONS ONLY
All Dimensions in Inches
Basic
 Screw 
Diameter
Head Diameter Head Height Slot Width Slot Depth
Max. Min. Max. Min. Max. Min. Max. Min.
2/56 .194 .180 .053 .044 .031 .023 .031 .022
3/48 .226 .211 .061 .051 .035 .027 .036 .026
4/40 .257 .241 .069 .059 .039 .031 .040 .030
5/40 .289 .272 .078 .066 .043 .035 .045 .034
6/32 .321 .303 .086 .074 .048 .039 .050 .037
8/32 .384 .364 .102 .088 .054 .045 .058 .045
10/24 .448 .425 .118 .103 .060 .050 .068 .053
10/32 .448 .425 .118 .103 .060 .050 .068 .053
12/24 .511 .487 .134 .118 .067 .056 .077 .061
1/4 .573 .546 .150 .133 .075 .064 .087 .070
5/16 .698 .666 .183 .162 .084 .072 .106 .085
3/8 .823 .787 .215 .191 .094 .081 .124 .100