3/8-16 x 1 1/4 is a square head machine set screw for assemblies that need point-style selection and direct wrench access.

Typical applications include retrofit work where the mating hole, flat, or seat determines the point style. Use the size to match the thread and length, then call out Half Dog, Full Dog, Cone, Oval, or Flat as the required point. 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. When the assembly cannot accept an exposed square head, compare headless socket set screw families before substituting.

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: 1 1/4 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.