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Use the 4-40 x 1 1/2 18-8 stainless hex head cap screw when the assembly calls for side wrench access and a general-purpose bolt pattern. In this size range it is treated as a hex head machine screw, with the hex head driven by external tooling rather than an internal socket.

Common application reviews include brackets, supports, and removable equipment panels. Use it through a clearance hole with a nut or into a prepared tapped hole when the drawing calls for a stainless hex-head fastener.

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: 4-40
  • Length: 1 1/2 in.
  • Head Style: Hex
  • Drive: External Hex (wrench or socket driven)
  • Width Across Flats: 2.175-2.250 in.
  • Head Height: 0.902-0.974 in.

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 4-40

Length

 N/A 1 1/2 in

Maximum Width Across the Flats

 N/A 2.250 in

Minimum Width Across the Flats

 N/A 2.175 in

Maximum Width Across Corners

 N/A 2.598 in

Minimum Width Across Corners

 N/A 2.480 in

Maximum Head Height

 N/A 0.974 in

Minimum Head Height

 N/A 0.902 in

Material

 N/A 18-8 Stainless Steel

Quantity

 N/A 100

Package Type

 N/A Box

Search

 N/A SSHHCMS.4-40.1 1/2

Note

Note

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