4-40 x 1 Cup Point 18-8 Stainless Steel Socket Set Screw with Nylon Insert is selected where a stainless cup point set screw also needs a thread-locking pellet. 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.
In retrofit vibrating assemblies, replacement collars, and maintenance repairs, the internal hex drive allows adjustment from the end of the tapped hole. 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 installs the locking pellet in-house on supported socket set screw sizes, with odd-size requests handled through quoting. 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.
Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.
