For replacement work on older equipment, 7/8-9 x 5/8 keeps the UNC pitch patch, length, and square-head drive clear in the product record.

Typical applications include farm implements, mill equipment, and production machinery that need wrench clearance. Use the size to match the thread and length, then call out Half Dog, Full Dog, Cone, Oval, or Flat as the required point. Flat points bear against a machined flat without intentional penetration into the mating surface.

Since 1962, Cold Headers has helped industrial buyers identify specialty set screws by thread, length, head style, and point requirement. The family runs UNC coarse thread throughout, the traditional square-head series. Cone points are typically chosen for a spot-drilled seat when a more fixed location is desired.

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: 5/8 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.