MIL-F-5577B (NOTICE 1), MILITARY SPECIFICATION: FITTINGS, TANK, POWERPLANT FLUID, REMOVABLE, GENERAL SPECIFICATION FOR (19 FEB 1995) [NO S/S DOCUMENT]., MIL-F-5577B, is inactive for new design and is no longer to be used except for replacementpurposes.Product Code:SAE AS6146 Title:Nut, Self Locking, Double Hexagon, Reduced Envelope, UNS66286 Issuing Committee:E-25 General Standards For Aerospace And Propulsion Systems Scope:Scope unavailable.