SS 321 Socket Head Cap Screws

SS 321 Socket Head Cap Screws are precision-engineered fasteners made from stabilized austenitic stainless steel, designed to withstand elevated temperatures and corrosive conditions. These screws feature a cylindrical head with an internal hex drive, allowing easy installation with a hex key in tight or recessed spaces. Known for their excellent resistance to oxidation and scaling up to 870°C, SS 321 Socket Head Cap Screws are widely used in exhaust manifolds, chemical processing, thermal plants, and aerospace structures. Zeron Fasteners supplies high-quality SS 321 Socket Head Cap Screws that combine strength, durability, and precision for dependable fastening performance across critical industrial environments.

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SS 321 Hex Bolts SS 321 Screws SS 321 Nuts SS 321 Washers SS 321 Stud Bolts

SS 321 Socket Head Cap Screws Chemical Composition

Element Composition (%)
Carbon (C) 0.08 max
Chromium (Cr) 17.0 - 19.0
Nickel (Ni) 9.0 - 12.0
Manganese (Mn) 2.0 max
Silicon (Si) 1.0 max
Phosphorus (P) 0.045 max
Sulfur (S) 0.03 max
Titanium (Ti) 5 x C min, 0.70 max
Iron (Fe) Balance

SS 321 Socket Head Cap Screws Mechanical Properties

Mechanical Property Value
Tensile Strength 515 MPa min
Yield Strength (0.2% offset) 205 MPa min
Elongation 40% min
Hardness (Brinell) 217 HB max
Melting Range 1400 - 1425°C

SS 321 Socket Head Cap Screws Feature Products

High Temperature Resistant Screws

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