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.

Request Information Search by Specification
Unit of Measure
Items
set-screw-cup-point-brass.png

4-40 x 1/8 Brass Cup Point Socket Set Screw
List Price (per 100 pieces) $20.00
set-screw-cup-point-brass.png

4-40 x 3/16 Brass Cup Point Socket Set Screw
List Price (per 100 pieces) $21.00
set-screw-cup-point-brass.png

4-40 x 1/4 Brass Cup Point Socket Set Screw
List Price (per 100 pieces) $22.00
set-screw-cup-point-brass.png

4-40 x 5/16 Brass Cup Point Socket Set Screw
List Price (per 100 pieces) $36.00
set-screw-cup-point-brass.png

4-40 x 3/8 Brass Cup Point Socket Set Screw
List Price (per 100 pieces) $37.00
Description N/A

4-40 x 1/8 Brass Cup Point Socket Set Screw is a Brass Cup Point Socket Set Screw used when a headless internal-hex fastener is specified for retaining or positioning a component.

It is commonly used in shaft collars, hubs, and control components, where a headless fastener secures a part without external head clearance. The internal hex drive allows socket-wrench access from the threaded hole, which is useful when surrounding components leave little room for external wrenching.

Review the 4-40 thread, 1/8 in. length, socket size, cup point diameter, mating surface, and material requirements before specifying the item. Confirm that point contact, brass material, and service conditions fit the application. Brass is often selected for nonferrous construction, electrical conductivity, general corrosion resistance, and distinctive appearance. The cup point creates rim-focused contact that may help resist relative movement when the screw, mating material, and installation conditions are appropriate. Cold Headers supports exact-size sourcing for brass socket set screws, including uncommon lengths and replacement requirements.

Technical Highlights

  • Material: Brass
  • Thread Size: 4-40
  • Length: 1/8 in.
  • Point Style: Cup Point
  • Nominal Screw Diameter: 0.112 in.
  • Hex Socket Size: 0.050 in.
  • Cup Point Diameter: 0.051-0.061 in.
  • Drive Type: Internal Hex

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

 		N/A

Designed for compact set-screw fastening, 4-40 x 3/16 Brass Cup Point Socket Set Screw combines brass construction with a cup-shaped point for localized contact at the mating surface.

Typical use cases include electrical controls, knobs, and handles, especially where brass material and internal-hex access are useful in a compact assembly. The internal hex drive keeps installation access compact while the headless body remains contained within the mating part.

For purchasing and replacement work, confirm the 4-40 thread, 3/16 in. length, socket size, and cup point diameter match the drawing or installed part. Confirm point contact, brass material, and service conditions fit the application. Use brass where the assembly calls for this material because of electrical, appearance, nonferrous, or replacement requirements. The recessed end form is often chosen where a witness mark or indentation on the mating surface is acceptable for the holding method. Cold Headers has supplied specialty socket fasteners since 1962 and helps buyers identify difficult brass set screw configurations.

Technical Highlights

  • Material: Brass
  • Thread Size: 4-40
  • Length: 3/16 in.
  • Point Style: Cup Point
  • Nominal Screw Diameter: 0.112 in.
  • Hex Socket Size: 0.050 in.
  • Cup Point Diameter: 0.051-0.061 in.
  • Drive Type: Internal Hex

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

 		N/A

For assemblies that call for a brass set screw by exact size, 4-40 x 1/4 Brass Cup Point Socket Set Screw identifies the required material, cup point geometry, thread, and length.

In instrumentation, enclosures, and equipment panels, this screw is often selected where a nonferrous set screw is specified for the hardware callout. The socket drive helps maintenance and assembly teams install or remove the fastener without needing side clearance around a head.

Selection should account for mating material, drive access, conductivity requirements, environmental exposure, and whether localized point contact is acceptable. This 4-40 x 1/4 size gives buyers a precise callout for ordering. It can fit electrical equipment, controls, instrumentation, fixtures, panels, and light-duty machinery when brass is specified. The point geometry gives the installer a defined end form for localized holding contact rather than a general-purpose threaded plug. Cold Headers works with distributors, maintenance teams, and production buyers that need clear size identification for specialty brass socket products.

Technical Highlights

  • Material: Brass
  • Thread Size: 4-40
  • Length: 1/4 in.
  • Point Style: Cup Point
  • Nominal Screw Diameter: 0.112 in.
  • Hex Socket Size: 0.050 in.
  • Cup Point Diameter: 0.051-0.061 in.
  • Drive Type: Internal Hex

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

 		N/A

4-40 x 5/16 Brass Cup Point Socket Set Screw is commonly specified where a component must be secured from within a tapped hole rather than with an external screw head.

Applications often include fixtures, display equipment, and adjustment assemblies, where the screw must sit inside a tapped part. The internal hex recess gives the installer controlled drive engagement while keeping the fastener profile inside the tapped component.

The verified dimensions below help engineering and purchasing teams compare the screw before ordering. Confirm that point contact, brass material, and service conditions fit the application. Final material selection should reflect the mechanical, electrical, environmental, and dimensional requirements of the assembly. This point style is intended for applications where localized contact is part of the retaining method, not for assemblies that require a nonmarking tip. Cold Headers helps match set screw thread, length, point style, material, and socket drive details for industrial purchasing and repair work.

Technical Highlights

  • Material: Brass
  • Thread Size: 4-40
  • Length: 5/16 in.
  • Point Style: Cup Point
  • Nominal Screw Diameter: 0.112 in.
  • Hex Socket Size: 0.050 in.
  • Cup Point Diameter: 0.051-0.061 in.
  • Drive Type: Internal Hex

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

 		N/A

When a maintenance list or drawing calls for a brass cup point set screw, 4-40 x 3/8 Brass Cup Point Socket Set Screw provides a clear product callout for purchasing and replacement work.

It is commonly used in couplings, pulleys, and sprockets, where localized contact helps position a component on a shaft. The internal hex drive allows socket-wrench access from the threaded hole, which is useful when surrounding components leave little room for external wrenching.

Review the 4-40 thread, 3/8 in. length, socket size, cup point diameter, mating surface, and material requirements before specifying the item. Confirm that point contact, brass material, and service conditions fit the application. Brass is often selected for nonferrous construction, electrical conductivity, general corrosion resistance, and distinctive appearance. Buyers should review the shaft or component surface condition, available drive access, electrical requirements, and required holding action before selecting this item. Cold Headers is a useful source when the part number, thread, point style, brass material, or length is difficult to locate through standard catalog channels.

Technical Highlights

  • Material: Brass
  • Thread Size: 4-40
  • Length: 3/8 in.
  • Point Style: Cup Point
  • Nominal Screw Diameter: 0.112 in.
  • Hex Socket Size: 0.050 in.
  • Cup Point Diameter: 0.051-0.061 in.
  • Drive Type: Internal Hex

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