For finished parts that need a softer bearing face, 1/4-28 x 1 1/2 supplies an alloy steel socket set screw with a nylon tip matched to the row's verified dimensions.
Typical uses include machine-tool stops on finished ways, fixture pads, and locating features used during setup. For maximum bite instead of surface protection, the related cup point alloy set screw family is the better comparison. Nylon is the softer contact choice for delicate finishes and repeated adjustment.
Cold Headers applies nylon and brass tips in-house, which keeps the contact-face detail tied closely to the socket fastener itself. The 3A thread fit keeps the screw in the precision set-screw class while the tip changes the way the end contacts the part.
Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.