4-40 x 5/16 Cone Point Alloy Steel Socket Set Screw with Nylon Insert is specified where a tapered conical point should nest into a prepared shaft spot while the nylon insert adds prevailing torque. For best seating, a shallow drilled dimple can help the point center consistently in the intended position. Use this alloy steel body with the nylon locking pellet where the drawing calls for a mechanical set screw, not a corrosion-focused stainless part.

OEM assemblies with spotted shafts use cone points to separate the locating function from ordinary clamp screws.

Cold Headers helps industrial buyers keep the point style, drive type, and locking feature aligned with the drawing requirement. Review thread size, length, hex key size, point style, and mating-surface marking tolerance before replacing it with another set screw. The internal hex recess also keeps installation access compact when the screw is recessed in a hub or collar.

Technical Highlights

• Point: Cone (tapered conical point)
• 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): 1/8 in., ±1/2 pitch
• Dimensional Standard: ASME B18.3

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