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.