REDUCER, BOSS
P/N: MS21916D8-4
P/N AS18280
P/N ER919D8-4
NSN: 4730-00-640-7200
MFG MILITARY STANDARDS
 
NEW GOV SURPLUS
SUPPLIER CAGE CODE 03EF7
 
ITEM NAME:   REDUCER,BOSS
DEFINITION:  A straight fitting having a boss connection of a different size at
             each end. Both connections have external or internal machine threads
             (straight threads other than pipe or hose series) and are designed to
             facilitate a gasket, preformed packing, washer, or the like to form a
             seal at the boss. Excludes BUSHING (as modified).
            
 
CHARACTERISTIC                          VALUE
THREAD CLASS                            3A ALL ENDS                                      
REDUCER TYPE                            CONCENTRIC                                       
END ITEM IDENTIFICATION                 HELICOPTER, CH-53A/D/E                           
CONNECTION STYLE                        EXTERNAL SEAT FOR GASKET SEAL (BOSS) ALL ENDS    
CONNECTION TYPE                         THREADED EXTERNAL BOSS ALL ENDS                  
NOMINAL THREAD SIZE                     0.750 INCHES 1ST END 0.438 INCHES 2ND END        
NOMINAL OVERALL LENGTH                  1.344 INCHES                                     
MATERIAL                                ALUMINUM ALLOY 2024 OVERALL                      
MATERIAL DOCUMENT AND                   QQ-A-225/6 FED SPEC SINGLE MATERIAL RESPONSE     
CLASSIFICATION                          OVERALL                                          
SURFACE TREATMENT                       ANODIZE OVERALL                                  
THREAD SERIES DESIGNATOR                UNF ALL ENDS                                     
SPECIFICATION/STANDARD DATA             96906-MS21916 GOVERNMENT STANDARD