For line-shaft hardware, collars, and similar mechanical locations, 1/2-13 x 4 1/2 gives buyers the square-head set screw style named on many older drawings.
Typical applications include older machine tools that were designed around wrench-driven set screws. Specify the point style at order; the same size can be supplied as Half Dog, Full Dog, Cone, Oval, or Flat. 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. Cup Point Slotted Headless Set Screws are the related headless option when flush-fitting screwdriver access is preferred.
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: 1/2-13 (UNC)
- Thread Fit: 2A (per ASME B18.6.2)
- Length: 4 1/2 in.
- Width Across Flats (F): 0.500 / 0.484 in. (max/min)
- Across Corners (G): 0.707 / 0.665 in. (max/min)
- Head Height (H): 0.389 / 0.361 in. (max/min)
- Dimensional Standard: ASME B18.6.2
Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.
