1/4-28 x 3 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.

Common applications include crushers and aggregate equipment, where exposed wrench flats remain easy to reach during service. For compact headless retention with key access, compare cup point socket set screws in alloy steel or 18-8 stainless steel.

This family includes uncommon square-head lengths, making the exact size useful for replacement searches and legacy drawings. 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: 1/4-28 (Class 2A)
• Length: 3 1/2 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.