Alloy Steel Cup Point Socket Set Screws

Alloy steel cup point socket set screws are headless threaded fasteners designed to secure gears, pulleys, collars, hubs, knobs, handles, and other components to shafts or mating parts. The internal hex socket allows installation through compact openings, while the cup-shaped point creates concentrated rim contact against the mating surface.

Cup point geometry is commonly selected when localized holding contact is needed to help resist movement between assembled components. Depending on the mating material and installation conditions, the point may create a witness mark or indentation on the contacted surface. These fasteners are frequently used in machinery, tooling, automation equipment, conveyor systems, packaging equipment, adjustment mechanisms, fixtures, maintenance repairs, and replacement assemblies.

Cold Headers supplies alloy steel cup point socket set screws in a broad range of inch thread sizes and lengths, including uncommon and difficult-to-source configurations. Individual product pages provide exact thread size, screw length, nominal diameter, hex socket size, cup point diameter, and other verified technical information where available. Review the listed dimensions along with the mating material, drive access, shaft condition, required holding action, and whether surface marking is acceptable.

Why Use a Cup Point Socket Set Screw?

• Cup point contact: The recessed point creates rim-focused contact with the mating surface.
• Headless design: Allows the fastener to install within or below the surrounding component surface.
• Internal hex drive: Supports installation with a hex key where external wrench clearance is unavailable.
• Component retention: Commonly used with shafts, collars, hubs, pulleys, gears, knobs, and adjustment assemblies.
• Exact-size selection: Product pages allow engineers and purchasers to compare thread, length, socket, and cup point dimensions.

Selecting the Correct Cup Point Set Screw

Begin by confirming the required thread size and screw length. Then review the hex socket size to ensure the correct installation tool is available. Cup point diameter, mating-surface material, available access, and the allowable level of surface marking should also be considered. Cup point set screws should not be substituted automatically for flat, oval, cone, or dog point styles because each point geometry creates a different contact condition.

Cold Headers Inc. has supplied specialty industrial socket fasteners since 1962. Our catalog is organized to help engineers, distributors, maintenance teams, and purchasing professionals locate exact sizes, uncommon lengths, and hard-to-find socket set screws without unsupported inventory claims.

Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.