4-40 x 2 1960 Series 18-8 Stainless Steel Socket Head Cap Screw with Nylon Insert pairs stainless construction with a nylon locking pellet for joints exposed to moisture and vibration. Nylon contact at the thread adds frictional resistance while preserving the standard internal hex drive arrangement.
This size is often reviewed for automation equipment, robotic end-of-arm tooling, and stainless brackets when a stainless cap screw must retain a familiar socket head form. Slight magnetism from cold working can be normal for 18-8 stainless, so selection should reflect the actual assembly environment and mating hardware.
For countersunk installations, 18-8 Flat Head Socket Cap Screws with Nylon Insert keep the locking feature in a different head style. For non-catalog pellet positions or unusual sizes, in-house pelletizing at the Chicago facility gives Cold Headers added sourcing flexibility.
Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.
