4-40 x 3/16 Oval Point Alloy Steel Socket Set Screw with Nylon Insert is a heat-treated alloy steel oval point socket set screw with a nylon insert for prevailing torque. Oval point geometry favors adjustable contact and re-seating rather than maximum bite into the mating part. Specify the heat-treated alloy steel body with nylon pellet when the print calls for mechanical set screw hardware, not a stainless substitute.
Spline-adjacent and keyway-adjacent seating may call for a rounded point where sharp engagement would be too aggressive. When maximum bite on a plain shaft matters more than adjustability, compare Cup Point Alloy Set Screws with Nylon Insert.
Cold Headers installs nylon locking pellets in-house at its Chicago facility for this oval point set screw family. Since 1962, Cold Headers has helped buyers distinguish similar socket set screws by point geometry and locking feature. Check thread size, length, socket size, pellet dimensions, groove or seat condition, and surface-marking tolerance before substitution.
Technical Highlights
- Point: Oval (rounded radiused tip)
- Material: Alloy Steel
- Thread Size: 4-40
- Length: 3/16 in.
- Drive: Internal Hex
- Hex Key Size: 0.050 in.
- Locking Feature: Nylon insert providing prevailing torque
- Nylon Insert Diameter (P): 1/16 in.
- Nylon Insert Location (N): 3/32 in., +/-1/2 pitch
- Dimensional Standard: ASME B18.3
Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.
