4-40 x 3/4 Cup Point 18-8 Stainless Steel Socket Set Screw with Nylon Insert helps address both component slip and screw back-out in one specified item. This double-lock arrangement separates the shaft-holding role of the cup point from the thread-locking role of the nylon insert. The stainless construction supports equipment that needs a clean finish without claiming 316-level chloride performance.

This size is often reviewed for outdoor equipment linkages, adjustable stops, and service hardware when stainless material and thread locking are both specified. Where maximum seating torque is the main driver, the Cup Point Alloy Steel Socket Set Screw with Nylon Insert may be the better strength-focused route.

Cold Headers supports hard-to-find socket set screw sourcing, including uncommon lengths and nylon-insert configurations. Review the thread size, length, hex key size, point style, and set-screw pellet location before matching the part to a service record or drawing.

Technical Highlights

• Point: Cup point, approx. 0.55-0.62 x nominal dia.
• Material: 18-8 Stainless Steel
• Thread Size: 4-40
• Length: 3/4 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.