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5/16-24 x 3/8 18-8 Stainless Steel Hex Head Cap Screw is built for conventional hex-head fastening through clearance holes or into tapped parts. 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 pump skids, utility equipment, and bolted flange details. Stainless-on-stainless threads can gall when run down fast or dry; moderate installation speed and thread lubricant are prudent on larger diameters.

18-8 stainless steel is an 18% chromium and 8% nickel austenitic stainless material used for ordinary atmosphere, moisture exposure, washdown, and clean appearance. Cold Headers has supplied specialty fasteners since 1962 and supports exact-size sourcing for hard-to-find industrial hardware.

Technical Highlights

  • Material: 18-8 Stainless Steel
  • Thread Size: 5/16-24
  • Length: 3/8 in.
  • Head Style: Hex
  • Drive: External Hex (wrench or socket driven)
  • Width Across Flats: 0.551-0.562 in.
  • Wrench Size: 9/16 in.
  • Head Height: 0.226-0.243 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 3/8 in

Maximum Width Across the Flats

 N/A 0.562 in

Minimum Width Across the Flats

 N/A 0.551 in

Maximum Width Across Corners

 N/A 0.650 in

Minimum Width Across Corners

 N/A 0.628 in

Maximum Head Height

 N/A 0.243 in

Minimum Head Height

 N/A 0.226 in

Material

 N/A 18-8 Stainless Steel

Quantity

 N/A 100

Package Type

 N/A Box

Search

 N/A SSHHCMS.5/16-24.3/8

Note

Note

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