5/16-18 x 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. Specify the point style at order; the same size can be supplied as Half Dog, Full Dog, Cone, Oval, or Flat. 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: 5/16-18 (UNC)
• Thread Fit: 2A (per ASME B18.6.2)
• Length: 3/4 in.
• Width Across Flats (F): 0.312 / 0.302 in. (max/min)
• Across Corners (G): 0.442 / 0.415 in. (max/min)
• Head Height (H): 0.245 / 0.224 in. (max/min)
• Dimensional Standard: ASME B18.6.2

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