SOCKET HEAD CAP SCREWS
An externally threaded fastener with unified threads, a cylindrical head with a flat chamfered top surface, knurled
cylindrical sides, and a hexagonal recess
DIAMETER
LENGTH
4/40
6/32
6/40
8/32
8/36
10/24
10/32
1/4-20
1/4-28
5/16-18
5/16-24
3/8-16
3/8-24
1/2-13
1/2-20
5/8-11
5/8-18

3/4-10

7/8-9

1-8
1/4
                        
3/8
                        
1/2
                        
5/8
                        
3/4
                        
1
                        
1-1/4
                        
1-1/2
                        
1-3/4
                        
2
                        
2-1/2
                        
3
                        
3-1/2
                        
4
                        
4-1/2
                        
5
                        
5-1/2
                        
6
                        
KEY
SIZE
3/32
7/64
9/64
5/32
3/16
1/4
5/16
3/8
1/2
5/8
3/4
3/4
Other materials, diameters, lengths, finishes, head styles, and variations are available in
Socket Head, Button Head, Flat Head
Alloy, Stainless, Aluminum, Nylon, Brass, Zinc Plated, Black Oxide
SOCKET SCREWS
ALLOY
SOCKET SCREWS
STAINLESS
HEX KEYS