1/4-28 x 3/8 Cup Point 18-8 Stainless Steel Socket Set Screw with Nylon Insert supports set-screw installations where no external head should project from the assembly. The cup point may leave a witness mark depending on shaft material and installation conditions, while the insert works in the threaded engagement. Use 18-8 stainless where the drawing calls for stainless material in indoor machinery, washdown-adjacent equipment, or humid service.
For retrofit vibrating assemblies, replacement collars, or maintenance repairs, check point contact, threaded engagement, and drive access before installation. If shaft protection matters more than cup-point bite, Nylon and Brass Tip 18-8 Socket Set Screws solve a different problem than nylon inserts.
Need the pellet in a non-catalog size? Cold Headers can review supported in-house pelletizing requests. 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: 1/4-28
- 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.
