specification covers locked in, keyring locked,
metal inserts which have self-looking and non-self-locking internal threads,
and provide8 technical requirements identifiable as NAS1838-1.
AIA/NAS NAS 1838-1982 history
1982AIA/NAS NAS 1838-1982 Inserts, Screw Thread - Metallic, Keyring Locked, Specification for (Rev. 1)