For drawings that call out a wrench-driven set screw, 5/8-11 x 3/4 identifies the coarse thread, length, material class, and square head geometry.

Typical applications include agricultural equipment with exposed mechanisms and field-adjusted stops. Half Dog, Full Dog, Cone, Oval, and Flat points are the ordering paths for this square-head series. External wrench access is useful when an internal socket recess would be hard to keep clear.

Cold Headers keeps this legacy set screw family practical for maintenance, repair, and production users who still need the square-head form. Review the selected point, wrench clearance, and mating feature before substitution. Cup point slotted set screws are the related screwdriver-driven option when flush-fitting access is preferred.

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: 3/4 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)
• Head Radius (W): 1.56 in. (min)
• Neck Relief: (K) 0.507 / 0.492 in. dia. (max/min), (U) 0.182 in. min width, (S) 0.059 in. min fillet
• Dimensional Standard: ASME B18.6.2

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