1/4-20 x 3/8 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. Slight magnetism from cold working can be normal for 18-8 stainless, so verify the material requirement against the actual assembly.
This size is often reviewed for collars and couplings on washdown conveyors, set collars, and shaft-mounted guides when stainless material and thread locking are both specified. If an all-metal holding feature is preferred, review Knurled Point 18-8 Socket Set Screws for mechanical ratchet-style grip.
For distributors, OEM sourcing, and maintenance work, Cold Headers can help match the thread, length, point style, material, and insert location. 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: 1/4-20
- Length: 3/8 in.
- Drive: Internal Hex
- Hex Key Size: 1/8 in.
- Locking Feature: Nylon insert providing prevailing torque
- Nylon Insert Diameter (P): 7/64 in.
- Nylon Insert Location (N): 3/16 in. +/-1/2 pitch
- Dimensional Standard: ASME B18.3
Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.
