4-40 x 3/16 Cup Point 18-8 Stainless Steel Socket Set Screw with Nylon Insert uses two locking interfaces in one headless fastener. The cup point's hollow rim bears on the shaft or mating part, while the nylon insert presses against the female thread to help resist back-out. 18-8 stainless steel is commonly selected for clean appearance, general corrosion resistance, and ordinary moisture exposure.
Typical uses include collars and couplings on washdown conveyors, set collars, and shaft-mounted guides, where the set screw must hold position without an external head. For 316 stainless with a nylon insert, treat the requirement as a non-catalog request that Cold Headers can quote.
Cold Headers has supplied specialty socket fasteners since 1962 and helps confirm exact set screw sizes for drawings and repairs. 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.
