Button Head Socket Cap Screws UNC/UNF – Imperial

*Button Head Sockets

Unified National Coarse / Fine

S350 – UNC/UNF Bare Steel

ANSI/ASME B18.3

2003

producttech-s350
Diameter – UNC #6-32 #8-32 #10-24 1/4-20 5/16-18 3/8-16 1/2-13 5/8-11
Diameter Code 006 008 010 014 016 018 024 026
t min. .044 .052 .070 .087 .105 .122 .175 .210
s 5/64 3/32 1/8 5/32 3/16 7/32 5/16 3/8
.078 .094 .125 .156 .188 .219 .312 .375
k max. .073 .087 .101 .132 .166 .199 .265 .331
d2 max. .262 .312 .361 .437 .547 .656 .875 1.000
R.S. Torque (in-lb) 16.5 30.1 43.7 104 215 382 931 1722
Length Code Pkg.
1/8 0013 100
3/16 0019 100
1/4 0025 100 100 100
5/16 0031 100
3/8 0038 100 100 100 100 100 100
1/2 0050 100 100 100 100 100 100
5/8 0063 100 100 100 100 100 100 100
3/4 0075 100 100 100 100 100 100 100
7/8 0088 100 100 100
1 0100 100 100 100 100 100 100 100 50
1-1/4 0125 100 100 100 100 100 50
1-1/2 0150 100 100 100 100 50 100 50
1-3/4 0175 100 100
2 0200 100 100 100 50 50 50
2-1/2 0250 100 100 50
3 0300 100
3-1/2 0350 50
Order Number -> 1/4 x 2 UNC = S350-014-0200 (Diameter Code x Length Code)
Diameter – UNF #10-32 1/4-28 5/16-24 3/8-24
Diameter Code 010 014 016 018
t min. .070 .087 .105 .122
s 1/8 5/32 3/16 7/32
.125 .156 .188 .219
k max. .101 .132 .166 .199
d2 max. .361 .437 .547 .656
R.S. Torque (in-lb) 43.7 104 215 382
Length Code Pkg.
1/4 0025 100
3/8 0038 100
1/2 0050 100 100
5/8 0063 100 100
3/4 0075 100 100 100 100
1 0100 100 100 100
1-1/2 0150 100
Order Number -> 1/4 x 2 UNF = S350-014-0200-F (Diameter Code x Length Code)(Fine Thread add -F)

R.S. Torque = Recommended Seating Torque

*NOTE

This product is designed and recommended for light fastening applications such as guards, hinges, etc. It is not suggested for use in critical high strength applications where socket head cap screws should normally be used.