1/4-28 x 2 1/2 Cup Point Square Head Set Screw is a plain-finish carbon steel fastener for square-head set screw specifications. The square flats also make the part recognizable on older assemblies that were designed before headless hex-socket set screws became common.

Industrial controls with exposed mechanical adjustments can use square-head set screws where a protruding wrench head is intentionally specified.

For older machinery and uncommon set screw callouts, Cold Headers helps match the requested diameter, length, head style, and point configuration. 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: 1/4-28 (Class 2A)
• Length: 2 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.