7/8-9 x 4 1/2 is intended for mechanical fastening positions where the square head remains exposed and a selected point style contacts the mating part.
Typical applications include gear and sprocket locking where a selected point bears on a prepared shaft feature. Because point style changes the mating contact, buyers should specify Half Dog, Full Dog, Cone, Oval, or Flat with the size. Half Dog points register into shallow holes or slots when location matters under load.
Cold Headers brings long socket and set screw experience to older machine platforms where square-head hardware is still specified. Review the selected point, wrench clearance, and mating feature before substitution. Socket set screw families provide the internal-drive alternative where square-head projection or wrench swing will not clear.
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: 7/8-9 (UNC)
- Thread Fit: 2A (per ASME B18.6.2)
- Length: 4 1/2 in.
- Width Across Flats (F): 0.875 / 0.852 in. (max/min)
- Across Corners (G): 1.237 / 1.170 in. (max/min)
- Head Height (H): 0.678 / 0.635 in. (max/min)
- Dimensional Standard: ASME B18.6.2
Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.
