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.