4-40 x 2 18-8 Stainless Steel Flat Head Cap Screw with Nylon Insert is specified where a raised head would catch, snag, or interfere with sliding equipment. The 82-degree flat head needs a matching countersink cut cleanly and concentrically so the cone bears correctly and the head seats true.
In automation cells, sensor plates, or compact machinery panels, the internal hex drive supports top-side installation after the countersink is prepared. For higher preload potential and a deeper socket, review 1960 Series 18-8 SHCS with Nylon Insert.
Slight magnetism from cold working can be normal for 18-8 stainless, so final material selection should reflect the assembly conditions. Cold Headers helps industrial buyers confirm hard-to-find countersunk socket fastener sizes for maintenance and production work.
Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.
