5/8-11 x 3 3/4 supports machine service where a protruding square head is intentional because it is easy to grip, inspect, and remove.

Typical applications include drive components, jackshaft assemblies, and plant maintenance repairs. Because point style changes the mating contact, buyers should specify Half Dog, Full Dog, Cone, Oval, or Flat with the size. External wrench access is useful when an internal socket recess would be hard to keep clear.

Cold Headers supports legacy square-head set screw requests where exact size and point selection matter more than generic substitution. 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 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.