5/16-18 x 2 1/2 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.

Sprocket hubs, drive collars, and shaft-mounted handles are natural locations for a cup point that bears against a mating surface. For square-head specifications that call for half dog, full dog, flat, cone, or oval points, review the broader Square Head Set Screws family.

Use Cold Headers when the requirement is specific: square head, cup point, carbon steel, Class 2A thread, and the length shown on the drawing. 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: 5/16-18 (Class 2A)
• Length: 2 1/2 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.