1/2-13 x 1/4 Cup Point 18-8 Stainless Steel Socket Set Screw with Nylon Insert is built for assemblies that need both cup-point holding action and prevailing torque. One interface helps hold the collar or hub against movement; the other adds friction in the thread so vibration is less likely to loosen the screw. The stainless construction supports equipment that needs a clean finish without claiming 316-level chloride performance.
This size is often reviewed for marine-adjacent hardware after chloride review, collars, and component retention when stainless material and thread locking are both specified. A nylon tip protects the shaft surface from marring, while a nylon insert locks the screw in its thread; those are different features.
Nylon inserts are installed in-house at the Cold Headers Chicago facility for supported set-screw 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: 1/2-13
- Length: 1/4 in.
- Drive: Internal Hex
- Hex Key Size: 1/4 in.
- Locking Feature: Nylon insert providing prevailing torque
- Nylon Insert Diameter (P): 5/32 in.
- Nylon Insert Location (N): 9/32 in. +/-1/2 pitch
- Dimensional Standard: ASME B18.3
Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.
