4730-00-227-6947 (MS39232-16B)
NSN 4730-00-227-6947 (NIIN 00-227-6947) is a pipe reducer in Federal Supply Class 4730, Hose, Pipe, Tube, Lubrication, And Railing Fittings — a straight pipe fitting having a different size connection on each end. Manufacturer part number MS39232-16B (Military Standards, CAGE 96906); also referenced as AMSE B16.3 (The American Society Of Mechanical); WWP521 (Federal Specifications Promulgated).
Key specs: 300 psi maximum second response operating pressure; 150 psi maximum first response operating pressure; full characteristics table below. NIIN assigned January 1961; DEMIL A (none required); unit of issue EA (each), $2.78 gov standard price; export Schedule B 7307.99.2000; ships at 1.5 lb / 0.0143 cu ft.