5/16-18 x 5/8 Cup Point 18-8 Stainless Steel Socket Set Screw with Nylon Insert combines cup-point bite, internal hex drive access, and nylon prevailing torque. The cup point may leave a witness mark depending on shaft material and installation conditions, while the insert works in the threaded engagement. 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 pulleys and sprockets in humid plants, light drives, and hub retention when stainless material and thread locking are both specified. For 316 stainless with a nylon insert, treat the requirement as a non-catalog request that Cold Headers can quote.
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.
Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.
