4-40 x 5/16 Oval Point Alloy Steel Socket Set Screw with Nylon Insert combines an oval bearing tip, internal hex drive, and nylon locking pellet for repeated machine settings. The rounded oval point can make tangent contact on flat, angled, curved, or grooved mating surfaces. Specify the heat-treated alloy steel body with nylon pellet when the print calls for mechanical set screw hardware, not a stainless substitute.

Automation machinery can use these screws in compact collars, guide blocks, stops, and control components.

This catalog separates oval point locking screws from plain oval point parts so the insert requirement stays visible. Check thread size, length, socket size, pellet dimensions, groove or seat condition, and surface-marking tolerance before substitution. Socket-key access remains compact when the screw sits below the outside surface of a collar or hub.

Technical Highlights

• Point: Oval (rounded radiused tip)
• Material: Alloy Steel
• Thread Size: 4-40
• Length: 5/16 in.
• Drive: Internal Hex
• Hex Key Size: 0.050 in.
• Locking Feature: Nylon insert providing prevailing torque
• Nylon Insert Diameter (P): 1/16 in.
• Nylon Insert Location (N): 3/32 in., +/-1/2 pitch
• Dimensional Standard: ASME B18.3

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