7/8-9 x 2 1/2 Cup Point Square Head Set Screw is a case hardened carbon steel set screw built around an external square head instead of a recessed drive. The open square head is useful when a standard wrench is preferred and the drive must stay visible during adjustment.
Common applications include crushers and aggregate equipment, where exposed wrench flats remain easy to reach during service. For compact headless retention with key access, compare cup point socket set screws in alloy steel or 18-8 stainless steel.
Fine-thread and longer square-head sizes are a hard-to-find lane, so exact thread and length identification matters before sourcing. 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: 2 1/2 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.
