4-40 x 5/8 Half Dog Point Alloy Steel Socket Set Screw with Nylon Insert is specified when the drawing calls for alloy steel, a half dog point, and a nylon insert in the same screw. Because the point registers into a prepared feature, check the shaft, hub, or fixture detail before substituting a cup point style.
Timing-critical gear and sprocket setups use this style when a drilled seat helps control position during reassembly. Check mating feature, hex access, screw length, and marking tolerance. Where a permanent spot-drilled interlock is wanted instead of a locating stub, Cone Point Alloy Set Screws with Nylon Insert may be the better reference.
For replacement work, Cold Headers identifies the requested alloy half dog screw by size, drive, point style, and locking feature. Review insert dimensions, hex key size, and ASME B18.3 before ordering this alloy steel socket set screw.
Technical Highlights
- Point: Half Dog (short cylindrical locating stub)
- Material: Alloy Steel
- Thread Size: 4-40
- Length: 5/8 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): 9/64 in., +/- 1/2 pitch
- Dimensional Standard: ASME B18.3
Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.
