1-8 x 7/8 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. Point choice is part of the order detail, with Half Dog, Full Dog, Cone, Oval, and Flat handled under this family. External wrench access is useful when an internal socket recess would be hard to keep clear.

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. Flat points bear against a machined flat without intentional penetration into the mating surface.

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: 1-8 (UNC)
• Thread Fit: 2A (per ASME B18.6.2)
• Length: 7/8 in.
• Width Across Flats (F): 1.000 / 0.974 in. (max/min)
• Across Corners (G): 1.414 / 1.337 in. (max/min)
• Head Height (H): 0.774 / 0.726 in. (max/min)
• Dimensional Standard: ASME B18.6.2

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