For legacy equipment built around open wrench access, the 7/8-9 x 3/8 Cup Point Square Head Set Screw keeps the drive on four exposed flats. Because there is no internal recess, the drive is less likely to pack with debris during plant maintenance or field repair.

Heavy collars and couplings may use cup point square heads when the installation favors visible external wrench flats. Because a square head protrudes and rotates with the shaft, exposed rotating assemblies near personnel may call for a guarded headless set screw instead.

Cold Headers can help confirm pricing and availability for exact-size square-head cup point set screws without making unsupported availability promises. Review the thread, length, square-head dimensions, and cup point diameter before substituting another set screw style.

Technical Highlights

• Head: Square, wrench-driven; flats match nominal size
• Point: Cup Point
• Thread Size: 7/8-9 (Class 2A)
• Length: 3/8 in.
• Width Across Flats: 0.875 max / 0.852 min in.
• Width Across Corners: 1.237 max / 1.170 min in.
• Head Height: 0.678 max / 0.635 min in.
• Cup Point Diameter: 0.530 max / 0.502 min in.
• Material: Carbon Steel, case hardened per ASME B18.6.2 (case hardness 83 HR15 minimum, case depth 0.006 in. minimum)
• Finish: Plain
• Dimensional Standard: ASME B18.6.2

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