5/16-24 x 1 1/4 Cup Point Square Head Set Screw supports traditional wrench-driven set screw service in heavy mechanical assemblies. The open square head is useful when a standard wrench is preferred and the drive must stay visible during adjustment.

Packing gland and follower adjustments are typical service points where wrench-driven set screws are still specified. Where a protruding head will not clear the design, Cup Point Slotted Headless Set Screws provide a screwdriver-driven headless alternative.

For older machinery and uncommon set screw callouts, Cold Headers helps match the requested diameter, length, head style, and point configuration. The thread, length, across-flats size, head height, and cup point diameter should be checked against the print before purchase.

Technical Highlights

• Head: Square, wrench-driven; flats match nominal size
• Point: Cup Point
• Thread Size: 5/16-24 (Class 2A)
• Length: 1 1/4 in.
• Width Across Flats: 0.312 max / 0.302 min in.
• Width Across Corners: 0.442 max / 0.415 min in.
• Head Height: 0.245 max / 0.224 min in.
• Cup Point Diameter: 0.172 max / 0.156 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.