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For drawings calling out 1-8 x 7/8, this 18-8 stainless hex head fastener supports assemblies where top-drive clearance is not required. 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 conveyors, material-handling equipment, and frame connections. For washdown or outdoor general-service use, review the actual environment and avoid assuming 18-8 is appropriate for severe chloride exposure.

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 serves maintenance and production needs where exact-size stainless hardware matters more than generic substitution.

Technical Highlights

  • Material: 18-8 Stainless Steel
  • Thread Size: 1-8
  • Length: 7/8 in.
  • Head Style: Hex
  • Drive: External Hex (wrench or socket driven)
  • Width Across Flats: 1.285-1.312 in.
  • Wrench Size: 1 5/16 in.
  • Head Height: 0.531-0.563 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 1-8

Length

 N/A 7/8 in

Maximum Width Across the Flats

 N/A 1.312 in

Minimum Width Across the Flats

 N/A 1.285 in

Maximum Width Across Corners

 N/A 1.516 in

Minimum Width Across Corners

 N/A 1.465 in

Maximum Head Height

 N/A 0.563 in

Minimum Head Height

 N/A 0.531 in

Material

 N/A 18-8 Stainless Steel

Package Type

 N/A Each

Search

 N/A SSHHCMS.1-8.7/8

Note

Note

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