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The 1/2-20 x 1 1/4 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 washdown areas, clean-looking assemblies, and general plant environments. When the design calls for a recessed counterbored fastener or tighter tool clearance, compare 18-8 Socket Head Cap Screws.

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: 1/2-20
  • Length: 1 1/4 in.
  • Head Style: Hex
  • Drive: External Hex (wrench or socket driven)
  • Width Across Flats: 1.812-1.875 in.
  • Head Height: 0.749-0.813 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 1/2-20

Length

 N/A 1 1/4 in

Maximum Width Across the Flats

 N/A 1.875 in

Minimum Width Across the Flats

 N/A 1.812 in

Maximum Width Across Corners

 N/A 2.165 in

Minimum Width Across Corners

 N/A 2.066 in

Maximum Head Height

 N/A 0.813 in

Minimum Head Height

 N/A 0.749 in

Material

 N/A 18-8 Stainless Steel

Quantity

 N/A 50

Package Type

 N/A Box

Search

 N/A SSHHCMS.1/2-20.1 1/4

Note

Note

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