5/16-18 x 4 is built for legacy machinery and industrial assemblies that still specify a square head set screw instead of a headless socket screw.
Typical applications include large adjustment stops, travel-limit hardware, and machine fixtures. Use the size to match the thread and length, then call out Half Dog, Full Dog, Cone, Oval, or Flat as the required point. Point selection should reflect the shaft feature, acceptable marking, and expected service adjustment.
Availability-row diameters and unusually long lengths are handled as quote-driven square-head requirements by Cold Headers. Review the selected point, wrench clearance, and mating feature before substitution. Oval points suit grooves or repeated adjustment where a radiused contact is useful.
Technical Highlights
- Head: Square, wrench-driven
- Material: Low Carbon Steel, Case Hardened
- Point Styles: Half Dog, Full Dog, Cone, Oval, Flat (specify at order)
- Thread Size: 5/16-18 (UNC)
- Thread Fit: 2A (per ASME B18.6.2)
- Length: 4 in.
- Width Across Flats (F): 0.312 / 0.302 in. (max/min)
- Across Corners (G): 0.442 / 0.415 in. (max/min)
- Head Height (H): 0.245 / 0.224 in. (max/min)
- Dimensional Standard: ASME B18.6.2
Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.
