1/4-28 x 5/8 Flat Point Alloy Steel Socket Set Screw with Nylon Insert is a heat-treated alloy steel flat point socket set screw with a nylon insert for prevailing torque. The internal hex drive keeps the screw headless and accessible in collars, hubs, and compact machine details. Use the heat-treated alloy steel body with the nylon locking pellet where the application calls for mechanical fastening rather than stainless material.

Handle and control retention often benefits from a headless screw that can be serviced from the socket end.

The nylon pellet is added to create thread drag while leaving the flat bearing face responsible for shaft contact. The catalog keeps this family separate from plain flat point screws so the nylon insert requirement remains visible. Check thread size, length, socket size, pellet dimensions, shaft-flat condition, and surface-marking tolerance before substitution.

Technical Highlights

• Point: Flat (full bearing face)
• Material: Alloy Steel
• Thread Size: 1/4-28
• Length: 5/8 in.
• Drive: Internal Hex
• Hex Key Size: 1/8 in.
• Locking Feature: Nylon insert providing prevailing torque
• Nylon Insert Diameter (P): 7/64 in.
• Nylon Insert Location (N): 3/16 in., +/-1/2 pitch
• Dimensional Standard: ASME B18.3

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