5/16-18 x 3/4 Oval Point Alloy Steel Socket Set Screw with Nylon Insert is suited to collars, knobs, and stops that may be loosened, rotated, and reset during service. Because the rounded point holds less aggressively than a biting point, final selection depends on load, access, and surface condition. Specify the heat-treated alloy steel body with nylon pellet when the print calls for mechanical set screw hardware, not a stainless substitute.
Machine rebuilds use this family when the service record calls for alloy steel, an oval point, and a nylon insert. The polymer insert changes the service envelope versus an all-metal screw, so review heat exposure before specifying it.
Cold Headers installs nylon locking pellets in-house at its Chicago facility for this oval point set screw family. This catalog separates oval point locking screws from plain oval point parts so the insert requirement stays visible. 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: 5/16-18
- Length: 3/4 in.
- Drive: Internal Hex
- Hex Key Size: 5/32 in.
- Locking Feature: Nylon insert providing prevailing torque
- Nylon Insert Diameter (P): 1/8 in.
- Nylon Insert Location (N): 7/32 in., +/-1/2 pitch
- Dimensional Standard: ASME B18.3
Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.
