ANSI ASME B18.3

Hexagon socket set screws - cone piont

tech-ansi-asme-b18-3-s331




Screw Thread
d		 0# 1# 2#
d Screw Diameter 0.06 0.073 0.086
PP UNC - 64 56
UNF 80 72 64
UNEF - - -
s Nominal Size 0.028 0.035 0.035
t min 0.05 0.06 0.06
L short (nom.) 0.13 0.19 0.19
α Nominal Size 90° 90° 90°

Screw Thread
d		 3# 4# 5#
d Screw Diameter 0.099 0.112 0.125
PP UNC 48 40 40
UNF 56 48 44
UNEF - - -
s Nominal Size 0.05 0.05 0.062
t min 0.07 0.07 0.08
L short (nom.) 0.19 0.19 0.19
α Nominal Size 90° 90° 90°

Screw Thread
d		 6# 8# 10#
d Screw Diameter 0.138 0.164 0.19
PP UNC 32 32 24
UNF 40 36 32
UNEF - - -
s Nominal Size 0.062 0.078 0.094
t min 0.08 0.09 0.1
L short (nom.) 0.25 0.25 0.25
α Nominal Size 90° 90° 90°

Screw Thread
d		 1/4 5/16 3/8
d Screw Diameter 0.25 0.3125 0.375
PP UNC 20 18 16
UNF 28 24 24
UNEF 32 32 32
s Nominal Size 0.125 0.156 0.188
t min 0.125 0.156 0.188
L short (nom.) 0.31 0.44 0.44
α Nominal Size 90° 90° 90°

Screw Thread
d		 7/16 1/2 5/8
d Screw Diameter 0.4375 0.5 0.625
PP UNC 14 13 11
UNF 20 20 18
UNEF 28 28 24
s Nominal Size 0.219 0.25 0.312
t min 0.219 0.25 0.312
L short (nom.) 0.63 0.63 0.88
α Nominal Size 90° 90° 90°

Screw Thread
d		 3/4 7/8 1
d Screw Diameter 0.75 0.875 1
PP UNC 10 9 8
UNF 16 14 12
UNEF 20 20 20
s Nominal Size 0.375 0.5 0.562
t min 0.375 0.5 0.562
L short (nom.) 1 1 1.25
α Nominal Size 90° 90° 90°

Screw Thread
d		 1-1/8 1-1/4 1-3/8
d Screw Diameter 1.125 1.25 1.375
PP UNC 7 7 6
UNF 12 12 12
UNEF 18 18 18
s Nominal Size 0.562 0.625 0.625
t min 0.562 0.625 0.625
L short (nom.) 1.5 1.5 1.75
α Nominal Size 90° 90° 90°

Screw Thread 1-1/2 1-3/4 2
d Screw Diameter 1.5 1.75 2
PP UNC 6 5 4.5
UNF 12 - -
UNEF 18 - -
s Nominal Size 0.75 1 1
t min 0.75 1 1
L short (nom.) 2 2.25 2.5
α Nominal Size 90° 90° 90°



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