1/4-20 x 3/8 Flat Point Alloy Steel Socket Set Screw with Nylon Insert gives designers a surface-respecting set screw option when the shaft should remain usable after repositioning. Flat point geometry favors surface protection and repeatable adjustment rather than maximum bite into the mating part. Use the heat-treated alloy steel body with the nylon locking pellet where the application calls for mechanical fastening rather than stainless material.

Typical uses include adjustable collars and stops on finished shafts where the contact mark must be controlled.

Cold Headers focuses on exact-size socket fastener sourcing for production, repair, and plant maintenance needs. Check thread size, length, socket size, pellet dimensions, shaft-flat condition, and surface-marking tolerance before substitution. The internal hex recess keeps installation access compact when the screw is recessed in a collar or hub.

Technical Highlights

• Point: Flat (full bearing face)
• Material: Alloy Steel
• Thread Size: 1/4-20
• Length: 3/8 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.