When dirt, oil, or frequent adjustment makes internal recesses less convenient, the 5/8-18 x 1 1/4 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.

Mixer and auger shafts may specify square heads so crews can reset collars, hubs, or followers without a special key. 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.

Cold Headers is a practical sourcing contact when a print still calls for square-head cup point hardware in a specific size. 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: 5/8-18 (Class 2A)
• Length: 1 1/4 in.
• Width Across Flats: 0.625 max / 0.606 min in.
• Width Across Corners: 0.884 max / 0.833 min in.
• Head Height: 0.485 max / 0.452 min in.
• Cup Point Diameter: 0.371 max / 0.347 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.