SAE J121M
Decarburization in Hardened and Tempered Metric Threaded Fasteners
Developed by committee: Fasteners Committee
Annotation and contents
Source of this annotation and contents: SAE.
This SAE Recommended Practice covers methods for measuring, classifying, and specifying decarburization in the threaded section of hardened and tempered steel bolts, screws, studs, and similar parts. It is not intended to cover products which are specifically carburized to achieve special properties.
Rationale:
Superseded by ISO 898-1 Mechanical properties of fasteners made of carbon steel and alloy steel —Part 1
