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SAE J121_201301
- Decarburization in Hardened and Tempered Unified Threaded Fasteners (Cancelled: Jan 2013)
- standard by SAE International, 01/02/2013
- Publisher: SAE
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Metric version available - reference J121M. Covers methods for measuring, classifying, & specifying decarburization in the threaded section of hardened & tempered steel bolts, screws, studs, & similar parts.