4-40 x 1/2 18-8 Stainless Steel Flat Head Cap Screw with Nylon Insert combines stainless material, internal hex drive access, and a nylon locking pellet. A countersunk head bears on the cone rather than a broad underside, so clamp load should not be treated like a full socket head cap screw. Flat head screw lengths are measured overall, head included, so this listed length is the total installed screw length.
This size is often reviewed for packaging machinery guards, changeover plates, and transfer covers when stainless material, a flush head, and locking friction are all specified. For a low-profile head without cutting a countersink, compare 18-8 Button Head Socket Cap Screws with Nylon Insert.
The 18% chromium and 8% nickel austenitic stainless material is commonly selected for general corrosion resistance, clean appearance, and ordinary washdown exposure. Since 1962, Cold Headers has helped distributors, repair teams, and OEM sourcing projects locate specialty socket products.
Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.
