The surface must be free from harmful scale, rust, or defects that could interfere with the cold heading or forging process. Typical Grades and Properties

The standard applies to carbon steel wires, generally covering a range of carbon content suitable for cold deformation.

High-tensile bolts, screws, studs, and specialized nuts.

To meet the JIS G3539 specification, the steel wires must undergo rigorous quality control testing. The primary requirements include:

The primary source for official JIS documents.

The wire is pulled through dies to achieve exact dimensional tolerances.

The official Japanese Standards Association bookstore offers authorized PDF downloads in both Japanese and English translations.

Specifies the minimum strength required to withstand forming forces.