Brass Cup Point Socket Set Screws

Brass cup point socket set screws are headless threaded fasteners used to secure collars, hubs, gears, pulleys, 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 localized rim contact against the mating surface.

Cup point geometry is commonly selected where concentrated holding contact is needed to help resist relative movement between assembled components. Depending on the mating material and installation conditions, the point may leave a witness mark or shallow indentation on the contacted surface. These fasteners are often used in electrical equipment, instrumentation, controls, enclosures, fixtures, light-duty machinery, adjustment assemblies, maintenance repairs, and replacement applications where brass is specified.

Brass provides a nonferrous material option with a distinctive appearance, general resistance to ordinary atmospheric corrosion, and useful electrical conductivity. Final product selection should reflect the actual mechanical load, environmental exposure, electrical requirements, mating material, and dimensional needs of the assembly.

Cold Headers supplies brass cup point socket set screws in a 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.

Why Use a Brass Cup Point Set Screw?

  • Cup point contact: The recessed point creates rim-focused contact with the mating surface.
  • Headless design: Allows installation within or below the surrounding component surface.
  • Internal hex drive: Supports installation with a hex key where external wrench clearance is limited.
  • Brass construction: Provides a nonferrous option for electrical, instrumentation, decorative, and general industrial assemblies.
  • Exact-size selection: Product pages allow engineers and purchasers to compare thread, length, socket, and cup point dimensions.

Selecting the Correct Brass Cup Point Set Screw

Begin by confirming the required thread size and screw length. Then review the hex socket size to ensure the proper installation tool is available. Cup point diameter, mating-surface material, available access, required holding action, allowable surface marking, and whether brass is appropriate for the load and service conditions 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 brass socket set screws without unsupported inventory claims.

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

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4-40 x 1/8 Brass Cup Point Socket Set Screw
List Price (per 100 pieces) $20.00
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4-40 x 3/16 Brass Cup Point Socket Set Screw
List Price (per 100 pieces) $21.00
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4-40 x 1/4 Brass Cup Point Socket Set Screw
List Price (per 100 pieces) $22.00
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4-40 x 5/16 Brass Cup Point Socket Set Screw
List Price (per 100 pieces) $36.00
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4-40 x 3/8 Brass Cup Point Socket Set Screw
List Price (per 100 pieces) $37.00
Description N/A The 4-40 x 1/8 Brass Cup Point Socket Set Screw is used where a brass set screw must seat against a shaft, hub, collar, or mating surface. It has a 4-40 thread and 1/8 in. length for matching a drawing, parts list, or maintenance requirement. The cup point concentrates contact at the end of the screw to help position or retain the mating component. Brass provides corrosion resistance, electrical conductivity, and non-magnetic behavior in compatible equipment environments. The internal hex drive supports installation with standard socket tooling in compact assemblies. Common uses include electric motors, shaft collars, and couplings, along with OEM machinery and industrial maintenance applications. Confirm thread engagement, mating material, and holding requirements before release to production. Call Cold Headers at 773-775-7900 or email your quote request to Sales@coldheaders.com. N/A Use the 4-40 x 3/16 Brass Cup Point Socket Set Screw when the design calls for brass material, a cup point, and an internal hex drive. It has a 4-40 thread and 3/16 in. length for matching a drawing, parts list, or maintenance requirement. The cup point concentrates contact at the end of the screw to help position or retain the mating component. Brass provides corrosion resistance, electrical conductivity, and non-magnetic behavior in compatible equipment environments. The internal hex drive supports installation with standard socket tooling in compact assemblies. Common uses include medical equipment, small mechanisms, and precision fixtures, along with OEM machinery and industrial maintenance applications. Confirm thread engagement, mating material, and holding requirements before release to production. Call Cold Headers at 773-775-7900 or email your quote request to Sales@coldheaders.com. N/A This 4-40 x 1/4 Brass Cup Point Socket Set Screw provides a compact socket-driven fastener for retaining components on shafts or in threaded holes. It has a 4-40 thread and 1/4 in. length for matching a drawing, parts list, or maintenance requirement. The cup point concentrates contact at the end of the screw to help position or retain the mating component. Brass provides corrosion resistance, electrical conductivity, and non-magnetic behavior in compatible equipment environments. The internal hex drive supports installation with standard socket tooling in compact assemblies. Common uses include instrumentation, control panels, and electrical equipment, along with OEM machinery and industrial maintenance applications. Confirm thread engagement, mating material, and holding requirements before release to production. Call Cold Headers at 773-775-7900 or email your quote request to Sales@coldheaders.com. N/A Specify the 4-40 x 5/16 Brass Cup Point Socket Set Screw for assemblies that require a non-ferrous socket set screw with a cup point end. It has a 4-40 thread and 5/16 in. length for matching a drawing, parts list, or maintenance requirement. The cup point concentrates contact at the end of the screw to help position or retain the mating component. Brass provides corrosion resistance, electrical conductivity, and non-magnetic behavior in compatible equipment environments. The internal hex drive supports installation with standard socket tooling in compact assemblies. Common uses include switchgear, panel hardware, and equipment service work, along with OEM machinery and industrial maintenance applications. Confirm thread engagement, mating material, and holding requirements before release to production. Call Cold Headers at 773-775-7900 or email your quote request to Sales@coldheaders.com. N/A The 4-40 x 3/8 Brass Cup Point Socket Set Screw is used where a brass set screw must seat against a shaft, hub, collar, or mating surface. It has a 4-40 thread and 3/8 in. length for matching a drawing, parts list, or maintenance requirement. The cup point concentrates contact at the end of the screw to help position or retain the mating component. Brass provides corrosion resistance, electrical conductivity, and non-magnetic behavior in compatible equipment environments. The internal hex drive supports installation with standard socket tooling in compact assemblies. Common uses include marine equipment, laboratory equipment, and maintenance assemblies, along with OEM machinery and industrial maintenance applications. Confirm thread engagement, mating material, and holding requirements before release to production. Call Cold Headers at 773-775-7900 or email your quote request to Sales@coldheaders.com.
Brands N/A Cold Headers, Inc.
Diameter N/A 4-40
Length N/A 1/8 in N/A 3/16 in N/A 1/4 in N/A 5/16 in N/A 3/8 in
Material N/A Brass
Quantity N/A 100
Package Type N/A Box