5-40 x 7/16 Cup Point Alloy Steel Socket Set Screw with Nylon Insert combines a cup point, internal hex drive, and nylon locking pellet in one headless fastener. The cup rim seats against the mating surface, while the nylon insert develops prevailing torque in the female thread.
Machine rebuilds standardized on alloy hardware can keep the same material and point style while adding a nylon insert. Confirm thread size, length, hex key size, cup point geometry, pellet diameter, and pellet location before substituting another set screw.
Cold Headers has supplied specialty socket fasteners since 1962 and helps buyers identify exact thread and length combinations. Nylon inserts are installed in-house at the Cold Headers facility in Chicago for this locking set screw family. Plain alloy steel is not selected for corrosion resistance; keep parts oiled or step to the 18-8 stainless version when the environment requires it.
Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.
