When dirt, oil, or frequent adjustment makes internal recesses less convenient, the 7/8-9 x 5/8 Cup Point Square Head Set Screw keeps the drive accessible. This pattern remains valuable on equipment where operators repeatedly loosen, reset, and tighten the same fastener.
Outdoor and quarry equipment may use the open head because mud, dust, and grease are easier to clear from flats than from a recess. For compact headless retention with key access, compare cup point socket set screws in alloy steel or 18-8 stainless steel.
Cold Headers keeps the catalog language focused on size, geometry, material, and verified dimensions so buyers can compare parts cleanly. 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: 5/8 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.
