MACHINE SCREWS
PAN HEAD SLOT
HEAD DIMENSIONS
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 .167 .155 .053 .045 .031 .023 .031 .022
3/48 .193 .180 .060 .0.51 .035 .027 .036 .026
4/40 .219 .205 .068 .058 .039 .031 .040 .030
5/40 .245 .231 .075 .065 .043 .035 .045 .034
6/32 .270 .256 .082 .072 .048 .039 .050 .037
8/32 .322 .306 .096 .085 .054 .045 .058 .045
10/24 .373 .357 .110 .099 .060 .050 .068 .053
10/32 .373 .357 .110 .099 .060 .050 .068 .053
12/24 .425 .407 .125 .112 .067 .056 .077 .061
1/4 .492 .473 .144 .130 .075 .064 .087 .070
5/16 .615 .594 .178 .162 .084 .072 .106 .085
3/8 .740 .716 .212 .195 .094 .081 .124 .100