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304 Stainless Steel
Knurled Socket Head

Shoulder Bolts

Socket Drive Bolts with an Extending Shoulder

Shoulder Bolts (also known as shoulder screws and stripper bolts) are machine screws with a shoulder between the thread of the screw and the head of the part. Once installed, the non-threaded shoulder extends out of the surface of the application site, allowing the bolts to act as dowels, shafts for moving parts, axles or guides for sliding pieces of an assembly. They can be installed by hand, or with a socket (allen) driver.

18-8 / 304 Stainless Steel

(18% Chrome, 8% Nickel, .08% Maximum Carbon) 18-8 Stainless refers to 300 series stainless steel. 303 and 304 Stainless are the most commonly listed grades, the standard grade for stainless steel fasteners. They are corrosion-resistant and durable. They are often used in marine applications in freshwater environments, but will not work as effectively in a salt water environment as 316 stainless. Stainless alloy resists oxidizing and rusting, however it can tarnish over time.