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SAE AS 4389A-2019
Nut - Self-Locking Clinch, Serrated Shank, Hole Preparation, Installation and Removal Procedures
This SAE Aerospace Standard (AS) provides minimum design, hole preparation, installation and removal requirements for AS3272, AS3273, MA3274, and MA3275 serrated shank self-locking clinch nuts. This standard is applicable when specified on engineering drawings or in procurement documents.
Society of Automotive Engineers [sae]