1/4-20 x 5/8 Cup Point Square Head Set Screw gives maintenance crews a wrench-driven cup point fastener for machinery that still calls out square-head hardware. The cup point creates localized contact with the mating surface, while the external flats give the installer a direct wrenching surface.
Conveyor drive pulleys and shaft-mounted components can use this pattern when a protruding drive head is acceptable. Plain carbon steel is not selected for corrosion resistance; keep parts oiled in service, or ask about stainless square-head options as a non-catalog request.
For older machinery and uncommon set screw callouts, Cold Headers helps match the requested diameter, length, head style, and point configuration. 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: 1/4-20 (Class 2A)
- Length: 5/8 in.
- Width Across Flats: 0.250 max / 0.241 min in.
- Width Across Corners: 0.354 max / 0.331 min in.
- Head Height: 0.196 max / 0.178 min in.
- Cup Point Diameter: 0.132 max / 0.118 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.
