Historical
SAE AS 4958-1997 (SAE AS4958-1997)
Performance, Nut, Self-Locking, Castellated, Prevailing Torque, UNJ 16 Pitch Thread Form ( Reaffirmed: Oct 2001 May 2006 )
This document covers all metal, castellated, self-locking nuts made from alloy steel of the types identified under the Unified Numbering System as UNS G41300 and UNS G43400. Where self-locking nuts with UNJ 16 pitch thread form are required for use with standard MIL-S-8879 external threads.
Society of Automotive Engineers [sae]