1 1/8-7 is an availability listing for the wrench-driven square head set screw series, with point style and standard length confirmed at order.

Typical applications include pulleys and sheaves on line shafts where the head is intentionally exposed. Specify the point style at order; the same size can be supplied as Half Dog, Full Dog, Cone, Oval, or Flat. External wrench access is useful when an internal socket recess would be hard to keep clear.

Cold Headers supports legacy square-head set screw requests where exact size and point selection matter more than generic substitution. 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: 1 1/8-7 (UNC)
• Thread Fit: 2A (per ASME B18.6.2)
• Width Across Flats (F): 1.125 / 1.096 in. (max/min)
• Across Corners (G): 1.591 / 1.505 in. (max/min)
• Head Height (H): 0.870 / 0.817 in. (max/min)
• Dimensional Standard: ASME B18.6.2

Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.