7/8-9 x 1 1/2 is a UNC square head set screw for applications where the installed head can project and the point is chosen separately.

Typical applications include dirty work areas where an external square head remains serviceable when recesses collect debris. The product record carries the size; the requested point is selected from the Half Dog, Full Dog, Cone, Oval, and Flat menu. Half Dog points register into shallow holes or slots when location matters under load.

Since 1962, Cold Headers has helped industrial buyers identify specialty set screws by thread, length, head style, and point requirement. Review the selected point, wrench clearance, and mating feature before substitution. External wrench access is useful when an internal socket recess would be hard to keep 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: 1 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.