5/16-18 identifies this UNC square-head set screw diameter for buyers who need point-style and length availability reviewed before ordering.

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.

Cold Headers can review less-common square-head sizes, long lengths, and point combinations when the standard catalog matrix does not cover the need. 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: 5/16-18 (UNC)
• Thread Fit: 2A (per ASME B18.6.2)
• 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.