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The 5/16-24 x 1/2 size in 18-8 stainless is suited to hex-head fastening where frames, brackets, or guards need serviceable external drive access. In this size range it is treated as a hex head cap screw, with the hex head driven by external tooling rather than an internal socket.

Common application reviews include retrofit repairs, service records, and exact-size replacement needs. 18-8 stainless is not a graded or heat-treated fastener; where certified high clamp loads govern, a graded steel hex bolt is the better tool.

18-8 stainless steel is an 18% chromium and 8% nickel austenitic stainless material used for ordinary atmosphere, moisture exposure, washdown, and clean appearance. For production, repair, and distributor sourcing, Cold Headers can help confirm the exact diameter and length before quoting.

Technical Highlights

  • Material: 18-8 Stainless Steel
  • Thread Size: 5/16-24
  • Length: 1/2 in.
  • Head Style: Hex
  • Drive: External Hex (wrench or socket driven)
  • Width Across Flats: 0.736-0.750 in.
  • Wrench Size: 3/4 in.
  • Head Height: 0.302-0.323 in.
  • Dimensional Standard: ASME B18.2.1
  • Material Standard: ASTM F593

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 5/16-24

Length

 N/A 1/2 in

Maximum Width Across the Flats

 N/A 0.750 in

Minimum Width Across the Flats

 N/A 0.736 in

Maximum Width Across Corners

 N/A 0.866 in

Minimum Width Across Corners

 N/A 0.840 in

Maximum Head Height

 N/A 0.323 in

Minimum Head Height

 N/A 0.302 in

Material

 N/A 18-8 Stainless Steel

Quantity

 N/A 100

Package Type

 N/A Box

Search

 N/A SSHHCMS.5/16-24.1/2

Note

Note

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