For line-shaft hardware, collars, and similar mechanical locations, 5/8-11 x 3 gives buyers the square-head set screw style named on many older drawings.

Typical applications include older machine tools that were designed around wrench-driven set screws. Half Dog, Full Dog, Cone, Oval, and Flat points are the ordering paths for this square-head series. Flat points bear against a machined flat without intentional penetration into the mating surface.

Cold Headers supports square-head set screw sourcing with a catalog organized around exact size, standard, and point selection. The family runs UNC coarse thread throughout, the traditional square-head series. For cup point square heads, use the separate Cup Point Square Head Set Screws category rather than this five-point family.

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: 5/8-11 (UNC)
• Thread Fit: 2A (per ASME B18.6.2)
• Length: 3 in.
• Width Across Flats (F): 0.625 / 0.606 in. (max/min)
• Across Corners (G): 0.884 / 0.833 in. (max/min)
• Head Height (H): 0.485 / 0.452 in. (max/min)
• Dimensional Standard: ASME B18.6.2

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