1/4-20 Socket Head Cap Screws

1/4-20 Socket Head Cap Screws | The Nutty Company, Inc.

1/4-20 Socket Head Cap Screws

1/4"-20 socket head cap screws in USS coarse (UNC) thread, made from heat treated alloy steel with a black oxide finish. We stock 3/8", 1/2", 5/8", 3/4", 7/8", 1", 1-1/4", 1-1/2", 1-3/4", 2", 2-1/4", 2-1/2", 2-3/4", 3", 3-1/2", 4", 4-1/2", 5", 6" lengths. They take a 3/16" hex key. Shorter lengths are fully threaded (FT) and longer lengths partially threaded (PT).

Specifications

Size: 1/4"-20 (USS coarse)
Lengths: 3/8", 1/2", 5/8", 3/4", 7/8", 1", 1-1/4", 1-1/2", 1-3/4", 2", 2-1/4", 2-1/2", 2-3/4", 3", 3-1/2", 4", 4-1/2", 5", 6"
Hex key: 3/16"
Tap drill: #7
Material: alloy steel, ASTM A574
Finish: black oxide
Strength: 180,000 psi minimum tensile strength (ASTM A574)

Common Uses

Machinery and tooling
Jigs and fixtures
Counterbored holes

FAQ

What hex key fits a 1/4"-20 socket head cap screw?
A 3/16" hex key (Allen wrench).

What tap drill do I use for 1/4"-20?
Use a #7 drill for a standard 75% thread.

Will black oxide socket screws rust?
Black oxide is a thin conversion finish with a light oil. It gives mild rust protection indoors and a clean dark look, but it is not made for outdoor or wet use. For outdoor, wet or washdown areas, use our stainless steel socket screws.

Free shipping on orders over $100, and orders placed before noon EST ship the same day. Purchase orders are accepted from government agencies, schools, hospitals, municipalities and companies with established credit with The Nutty Company, Inc.