3/8-16 x 7/8 is a case hardened low carbon steel square head set screw for machinery that uses wrench-driven adjustment or retention.

Typical applications include crusher and screen plants that use rugged retaining screws around shafts and collars. Specify the point style at order; the same size can be supplied as Half Dog, Full Dog, Cone, Oval, or Flat. Half Dog points register into shallow holes or slots when location matters under load.

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 Headless Set Screws are the related headless option when flush-fitting screwdriver 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: 3/8-16 (UNC)
• Thread Fit: 2A (per ASME B18.6.2)
• Length: 7/8 in.
• Width Across Flats (F): 0.375 / 0.362 in. (max/min)
• Across Corners (G): 0.530 / 0.497 in. (max/min)
• Head Height (H): 0.293 / 0.270 in. (max/min)
• Dimensional Standard: ASME B18.6.2

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