When the print calls for a tipped set screw rather than a cup point, 4-40 x 5/16 gives buyers a nylon contact face on an alloy steel body.
Typical uses include lead screws, ball screws, racks, and adjustment stops that are reset during setup. The 3A thread fit keeps the screw in the precision set-screw class while the tip changes the way the end contacts the part. Nylon is the softer contact choice for delicate finishes and repeated adjustment.
The Chicago tip-installation service lets Cold Headers support both catalog tipped screws and related cap screw tipping work. For humid or washdown service, compare the Nylon and Brass Tip 18-8 Stainless Socket Set Screws family; this page remains the alloy-body route.
Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.
