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5/16-18 x 2 1/2 is a UNC square head set screw for applications where the installed head can project and the point is chosen separately.

Typical applications include dirty work areas where an external square head remains serviceable when recesses collect debris. This family is ordered as one size across five point choices: Half Dog, Full Dog, Cone, Oval, and Flat. External wrench access is useful when an internal socket recess would be hard to keep clear.

Cold Headers keeps this legacy set screw family practical for maintenance, repair, and production users who still need the square-head form. Review the selected point, wrench clearance, and mating feature before substitution. Cup Point Slotted Headless Set Screws are the related headless option when flush-fitting screwdriver access is preferred.

Technical Highlights

  • Head: Square, wrench-driven
  • Material: Low Carbon Steel, Case Hardened
  • Point Styles: Half Dog, Full Dog, Cone, Oval, Flat (specify at order)
  • Thread Size: 5/16-18 (UNC)
  • Thread Fit: 2A (per ASME B18.6.2)
  • Length: 2 1/2 in.
  • Width Across Flats (F): 0.312 / 0.302 in. (max/min)
  • Across Corners (G): 0.442 / 0.415 in. (max/min)
  • Head Height (H): 0.245 / 0.224 in. (max/min)
  • 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 in

Length

 N/A 2 1/2 in

Weight

 N/A 4.85 lb

Type

 N/A 1/2 Dog Cone Flat Full Dog Odd Point Oval

Material

 N/A Carbon Steel

Quantity

 N/A 100

Package Type

 N/A Box

Search

 N/A SHSS.5/16.2 1/2

Note

Note

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

5/16-18 x 1/2 NO longer available in Full Dog Points.