National Item Identification Number
00-990-1257
009901257
4730-00-990-1257
4730009901257
National Stock Number
Item Name
REDUCER,BOSS
Federal Supply Class
4730
Description
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).
Commercial and Government Entity Code (Supplier Data)
81343
81343
81343
Reference Numbers (Part Numbers)
AS18280
AS21916
MS21916-8-5C
MS21916J8-5
MS21916J8-5
Required Categories
MATERIAL
SURFACE TREATMENT
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION
CONN
Required Description
STEEL CORROSION RESISTING OVERALL
PASSIVATE OVERALL
MIL-S-5002 MIL SPEC SINGLE