4-40 x 1/2 18-8 Stainless Steel Button Head Socket Cap Screw with Nylon Insert combines internal hex drive access with a thread-mounted nylon pellet for prevailing torque. The nylon pellet presses against the mating thread for prevailing torque without changing the head geometry.
Button head geometry is useful around access covers, machine guards, and operator-contact surfaces where a smooth exposed profile is preferred. This size is often reviewed for conveyor side rails, guide brackets, and packaging-line guards when stainless material, a button head, and a locking pellet are all specified.
The 18% chromium and 8% nickel austenitic stainless material is commonly chosen for general corrosion resistance, clean appearance, and ordinary moisture exposure. For higher preload potential with a deeper socket, compare 18-8 Socket Head Cap Screws with Nylon Insert. Since 1962, Cold Headers has helped industrial buyers locate specialty socket products for production, repair, and replacement requirements.
Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.
