12-28 x 5/8 Alloy Steel Button Head Socket Cap Screw helps machine builders secure covers, brackets, and housings while keeping the head smooth and accessible. The alloy steel construction supports machine construction where the drawing calls for reduced head projection and a socket-drive button head.

Common installation points include production machinery and maintenance repair where socket engagement is practical where side clearance is limited. It may also be specified for production machinery and maintenance repair when socket engagement is practical where side clearance is limited. Selection is usually driven by head shape, socket access, and exposed-surface requirements rather than by the geometry of a standard socket head cap screw.

When matching the 12-28 thread and 5/8 in. length, the reference head diameter is 0.383-0.413 in. and the head height is 0.104-0.117 in. The nominal body diameter and hex-key information below help confirm fit, tool clearance, and replacement requirements.

Technical Highlights

  • Material: Alloy Steel
  • Thread Size: 12-28
  • Length: 5/8 in.
  • Nominal Body Diameter: #12 (.215 in.)
  • Head Diameter: 0.383-0.413 in.
  • Head Height: 0.104-0.117 in.
  • Hex-Key Size: Hex-key size may be 1/8 in. or 5/32 in., depending on manufacturer.
  • Drive Type: Internal Hex

Reference dimensions may vary slightly by manufacturer.

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 12-28

Length

N/A 5/8 in

Material

N/A Alloy Steel

Quantity

N/A 100

Package Type

N/A Box

Search

N/A ASBHSCS.12-28.5/8