Where socket recesses can fill with debris, 5/16-18 x 1 3/4 offers an external square head that can be turned without relying on an internal drive.

Typical applications include legacy equipment repairs that need the square-head form called out on older drawings. 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 keeps the record focused on usable engineering details so buyers can compare the callout against drawings and service notes. The family runs UNC coarse thread throughout, the traditional square-head series. Cone points are typically chosen for a spot-drilled seat when a more fixed location is desired.

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: 1 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.