4-40 x 5/8 Alloy Steel Cup Point Socket Set Screw is an Alloy Steel 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 machine controls, where a headless fastener must hold a component without external head clearance. The internal hex drive allows socket-wrench access from the top of the threaded hole, which is useful when the surrounding assembly leaves little room for external wrenching.
Review the 4-40 thread, 5/8 in. length, hex socket size, and cup point diameter against the mating part before specifying the item. Always confirm that the cup point contact is acceptable for the mating component and service conditions. Compared with a plain threaded plug, the cup-shaped end gives the installer a defined point style for holding or adjustment work. Cold Headers works with distributors, maintenance teams, and production buyers that need clear size identification for specialty socket products.
Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.
