4-40 Stainless Socket Head Cap Screw

4-40 Stainless Socket Head Cap Screw

#4-40 socket head cap screws with USS coarse (UNC) thread, made from 18-8 stainless steel. We stock 1/4", 3/8", 1/2", 5/8", 3/4", 7/8", 1", 1-1/4", 1-1/2", 2" lengths. They take a 3/32" hex key.

Specifications

• Size: #4-40 (USS coarse)
• Lengths: 1/4", 3/8", 1/2", 5/8", 3/4", 7/8", 1", 1-1/4", 1-1/2", 2"
• Hex key: 3/32"
• Thread: USS coarse (UNC)
• Drive: hex socket
• Material: 18-8 stainless steel

Common Uses

• Machinery and fixtures
• Food and medical equipment
• Marine equipment

FAQ

What hex key fits a #4-40 socket head cap screw?
A 3/32" hex key (Allen wrench).

How do I stop stainless threads from galling?
Stainless threads can seize (gall) when tightened fast or under heavy load. Put anti-seize on the threads, tighten slowly at low speed, keep the threads clean and don't overtighten.

Related: Stainless Hex Nuts | All Stainless Socket Head Cap Screws USS

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.