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5/16-18 x 5 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: 5/16-18 (Class 2A)
  • Length: 5 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.

Unit of Measure

Specifications

Brands

 N/A Cold Headers, Inc.

Diameter

 N/A 5/16-18

Length

 N/A 5 in

Material

 N/A Carbon Steel

Shape

 N/A Square

Quantity

 N/A 100

Package Type

 N/A Box

Search

 N/A CPSHSS.5/16-18.5

Note

Note

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

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