6-40 x 5/8 Flat Point Alloy Steel Socket Set Screw with Nylon Insert is specified when friction clamping and thread-level locking are both required in a headless fastener. Flat point geometry favors surface protection and repeatable adjustment rather than maximum bite into the mating part. Use the heat-treated alloy steel body with the nylon locking pellet where the application calls for mechanical fastening rather than stainless material.
Handle and control retention often benefits from a headless screw that can be serviced from the socket end.
The nylon pellet is added to create thread drag while leaving the flat bearing face responsible for shaft contact. Cold Headers has supplied specialty socket fasteners since 1962 and keeps point style, insert type, and size language clear. Check thread size, length, socket size, pellet dimensions, shaft-flat condition, and surface-marking tolerance before substitution.
Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.
