Stainless, Carbon, & Alloy Steel Socket Head Cap Screws

When appearance and strength are important to an application, socket head cap screws are ideal. They can be found in plastic injection molds, tooling, power transmission, and metal stamping dies. They are ideal for the oil and gas industry for resisting high pressures and harsh environments, as well as manufacturing.

Tensile strength varies by material and heat treatment, but a standard inch series is generally 20% stronger than a Grade 8 hex head cap screw and an impressive 50% strong than a Grade 5. There is a minimum of 180,000 psi in tensile strength for ½” diameter screws and smaller, with screws of a 5/8” diameter and above having a tensile strength of 170,000 psi.

ASTM A574 is the specification for quenched and tempered alloy steel socket head cap screws, 0.060 thru 4” diameter where high strength is required for the application.

ASTM F837 is the specification for stainless steel socket head cap screws requiring general corrosion resistance, diameter range is 0.060 thru 1-1/2”.

• Three groups of stainless steel alloys are covered under this specification: Austenitic Group 1 & 2 and Martensitic Group 5.
• Four property conditions are covered: austenitic Alloy Groups 1 and 2 in an annealed condition (AF) at 85 ksi maximum, in two cold worked conditions (CW) at 80 ksi minimum, (CW1) at 102 ksi minimum, and martensitic Alloy Group 5 in a heat treated condition (HT) at 160 ksi minimum.