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Where a bill of material calls for a wrench-driven cup point screw, the 1-8 x 4 Cup Point Square Head Set Screw keeps the size and geometry explicit. It is a practical choice when top-side wrench access is available and a protruding head is acceptable in the design.

Legacy machine rebuilds often need the same square-head geometry to match existing drawings and replacement records.

Cold Headers keeps the catalog language focused on size, geometry, material, and verified dimensions so buyers can compare parts cleanly. 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: 1-8 (Class 2A)
  • Length: 4 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.

Unit of Measure

Specifications

Brands

 N/A Cold Headers, Inc.

Diameter

 N/A 1-8

Length

 N/A 4 in

Material

 N/A Carbon Steel

Shape

 N/A Square

Quantity

 N/A 10

Package Type

 N/A Box

Search

 N/A CPSHSS.1-8.4

Note

Note

 N/A Less Than Package Quantity Specified Plus 25%.

1 1/8" Diameter and Larger also Stocked Prices on Application.