5-40 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. 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.

Finished shafting, control rods, and small mechanical linkages can use a broad contact point to reduce marring. ASME B18.3 places flat point diameter in a qualitative band of about 0.55-0.62 times nominal screw diameter, so confirm the mating seat rather than substituting a sharp point.

Since 1962, Cold Headers has helped buyers sort closely related socket products that can be easy to confuse. 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: 5-40
• Length: 5/8 in.
• Drive: Internal Hex
• Hex Key Size: 1/16 in.
• Locking Feature: Nylon insert providing prevailing torque
• Nylon Insert Diameter (P): 1/16 in.
• Nylon Insert Location (N): 7/64 in., +/-1/2 pitch
• Dimensional Standard: ASME B18.3

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