For drawings that call out a wrench-driven set screw, 7/8-9 x 2 1/2 identifies the coarse thread, length, material class, and square head geometry.
Typical applications include agricultural equipment with exposed mechanisms and field-adjusted stops. Use the size to match the thread and length, then call out Half Dog, Full Dog, Cone, Oval, or Flat as the required point. Half Dog points register into shallow holes or slots when location matters under load.
Cold Headers keeps the record focused on usable engineering details so buyers can compare the callout against drawings and service notes. Review the selected point, wrench clearance, and mating feature before substitution. Half Dog points register into shallow holes or slots when location matters under load.
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: 2 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.
