MACHINE SCREWS
FLAT HEAD SLOT

All Dimensions in Inches

Screw 
Diameter

Head Diameter Head Height Slot Width Slot Depth
Max. Min. Max. Min. Max. Min. Max. Min.
4/40 .225 .200 .067 .055 .039 .031 .030 .020
6/32 .279 .249 .083 .069 .048 .039 .038 .024
8/32 .332 .300 .100 .084 .054 .045 .045 .029
10/24 .385 .348 .116 .098 .060 .050 .053 .034
10/32 .385 .348 .116 .098 .060 .050 .053 .034
1/4-20 .507 .462 .153 .131 .075 .064 .070 .046