1-8 x 4 1/2 Cup Point Square Head Set Screw is a case hardened carbon steel set screw built around an external square head instead of a recessed drive. 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.

Square-head cup point screws in fine thread and extended lengths can be difficult to source, so the SKU detail should be checked closely. 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: 1-8 (Class 2A)
• Length: 4 1/2 in.
• Width Across Flats: 1.000 max / 0.974 min in.
• Width Across Corners: 1.414 max / 1.337 min in.
• Head Height: 0.774 max / 0.726 min in.
• Cup Point Diameter: 0.609 max / 0.579 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.