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Use the 4-40 x 7/16 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 HVAC equipment, conveyor structures, and retrofit repairs. 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' catalog work is strongest where the requested size, material, and application details need a careful match.

Technical Highlights

  • Material: 18-8 Stainless Steel
  • Thread Size: 4-40
  • Length: 7/16 in.
  • Head Style: Hex
  • Drive: External Hex (wrench or socket driven)
  • Width Across Flats: 0.612-0.625 in.
  • Wrench Size: 5/8 in.
  • Head Height: 0.272-0.291 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 7/16 in

Maximum Width Across the Flats

 N/A 0.625 in

Minimum Width Across the Flats

 N/A 0.612 in

Maximum Width Across Corners

 N/A 0.722 in

Minimum Width Across Corners

 N/A 0.698 in

Maximum Head Height

 N/A 0.291 in

Minimum Head Height

 N/A 0.272 in

Material

 N/A 18-8 Stainless Steel

Quantity

 N/A 100

Package Type

 N/A Box

Search

 N/A SSHHCMS.4-40.7/16

Note

Note

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