Additional Information:

A locking device with two keys spaced approximately 180 degrees center to center and protruding from the seating surface of the ring. When installed the keys mate with companion keyways in the external threads of screw thread inserts, locked-in studs, or similar type items, and cut through sufficient threads of the parent material tapped hole to provide a positive lock between the threaded bodies.

Cross Reference

6420-4, 01556EMHART TEKNOLOGIES LLC DBA EMHART FASTENING TEKNOLOGIES6420-4, 83324ALCOA GLOBAL FASTENERS, INC. DBA ALCOA FASTENING SYSTEMS702-4, 01556EMHART TEKNOLOGIES LLC DBA EMHART FASTENING TEKNOLOGIES99-4000-4 99167HAMILTON SUNDSTRAND CORPORATIONKR4A15, 01556EMHART TEKNOLOGIES LLC DBA EMHART FASTENING TEKNOLOGIESRD24395-4A 51663CRANE CO. DBA LEAR ROMEC

Restrictions/Controls & Freight Information

Shelf-Life Code:0Nondeteriorative Hazardous Material Indicator CodeNThere is no data in the HMIS and the NSN is in an FSC not generally suspected of containing hazardous materials Demilitarization Code:ANon-Munitions List Item/ Non-Strategic List Item - Demilitarization not required. Controlled Inventory Item Code:UUNCLASSIFIED Precious Metals Indicator Code:AItem does not contain precious metal Criticality Code:X The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.

Management

Budget Code9 General Support DIV57X4921.070:Air Force decentrally managed expense items (ERRC XB3, XF-3) with a unit cost of less than $250,000 that are requisitioned/procured at base (retail) level from DLA, GSA, Army, Navy, Depot Maintenance Service, Air Force Industrial Fund (AFMC), local manufacture and commercial vendors.Price ValidationN The current standard price in Catalog Management Data (CMD) has not analyzed or coded for LP/LM.The price has not been analyzed or reviewed for accuracy.ZOP or Standard price challenges are permissible, but must be supported with adequate justification. However, if coded for Local Purchase (LP) or Fabrication/Manufacture as indicated with an (LM) Acquisition Advice Code of ?L? or?F?,the case must be evaluated locally where purchased or fabricated.Fund CodeSFStock fund applicable to items managed for the Air Force by the respective Inventory Control Point.Materiel Management Aggregation CodeSXSX:AF SICA RESIDUAL MMAC-OC-ALCSource of SupplySMSDefense Logistics AgencyEnterprise Business SystemsAgencyDFDepartment of the Air ForceService OrganizationFU.S. Air ForceReparabilityNStock Fund (except Munitions)Acquisition Advice CodesZINSURANCE/NUMERIC STOCKAGE OBJECTIVE ITEM # Items which may be required occasionally or intermittently, and prudence requires that a nominal quantity of materiel be stocked due to the essentiality or the lead time of the item. 1. The item is centrally managed, stocked, and issued. 2. Requisitions will be submitted in accordance with IMM/Service requisitioning procedures. Controlled Item CodeUUNCLASSIFIEDShelf Life Code0NondeteriorativePurchasingQTY UOM1 EA : Each

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