When seating force and cup-point bite are the priority, the 1/4-28 x 2 Cup Point Alloy Steel Socket Set Screw with Nylon Insert is the industrial alloy choice. The cup rim seats against the mating surface, while the nylon insert develops prevailing torque in the female thread.
Packaging machinery and indexing assemblies can use the nylon insert where a cup point setting should hold through repeated cycling. 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. Cold Headers installs the locking pellet in-house, which helps with uncommon lengths and specialty nylon-insert requirements. 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.
Technical Highlights
- Point: Cup (approximately 0.55-0.62 x nominal diameter)
- Material: Alloy Steel
- Thread Size: 1/4-28
- Length: 2 in.
- Drive: Internal Hex
- Hex Key Size: 1/8 in.
- Locking Feature: Nylon insert providing prevailing torque
- Nylon Insert Diameter (P): 7/64 in.
- Nylon Insert Location (N): 3/16 in., +/-1/2 pitch
- Dimensional Standard: ASME B18.3
Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.
