4-40 x 3/8 Cone Point Alloy Steel Socket Set Screw with Nylon Insert pairs cone-point shaft engagement with a nylon locking pellet in a compact internal-hex set screw. The cone point is selected for mechanical interlock because the tapered tip seats into a spot or dimple instead of only pressing on the surface. Use this alloy steel body with the nylon locking pellet where the drawing calls for a mechanical set screw, not a corrosion-focused stainless part.
Maintenance repairs often need the exact thread, length, point style, and locking insert that match the service record. Plain alloy steel is not selected for corrosion resistance, so keep parts oiled or choose a stainless request when the environment requires it.
When a bill of material calls out cone point alloy hardware with a nylon insert, Cold Headers keeps the catalog path specific. Review thread size, length, hex key size, point style, and mating-surface marking tolerance before replacing it with another set screw.
Technical Highlights
- Point: Cone (tapered conical point)
- Material: Alloy Steel
- Thread Size: 4-40
- Length: 3/8 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): 1/8 in., ±1/2 pitch
- Dimensional Standard: ASME B18.3
Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.
