WOOD SCREWS
FLAT HEAD SLOT
HEAD DIMENSIONS

SPECIFICATIONS

Nominal 
Size

Head Diameter Head Height Slot Width Slot Depth
Max. Min. Max. Min. Max. Min. Max. Min.
2 .172 .150 .051 .040 .031 .023 .023 .015
3 .199 .175 .059 .048 .035 .027 .027 .017
4 .225 .200 .067 .055 .039 .031 .030 .020
5 .252 .225 .075 .062 .043 .035 .034 .022
6 .279 .249 .083 .069 .048 .039 .038 .024
7 .305 .274 .091 .076 .048 .039 .041 .027
8 .332 .300 .100 .084 .054 .045 .045 .029
10 .385 .348 .116 .098 .060 .050 .053 .034
12 .438 .397 .132 .112 .067 .056 .060 .039
14 .491 .447 .148 .127 .075 .064 .068 .044
1/4 .507 .462 .153 .131 .075 .064 .070 .046
5/16 .635 .581 .191 .165 .084 .072 .088 .058
3/8 .762 .700 .230 .200 .094 .081 106 .070