3040-01-315-1004 (BF-6)
NSN 3040-01-315-1004 (NIIN 01-315-1004) is a breather in Federal Supply Class 3040, Miscellaneous Power Transmission Equipment — a mechanical device designed to permit a free flow of air into and out of an enclosure, usually used on engine crankcase. Manufacturer part number BF-6 (Lenz Co, CAGE 4K739).
NIIN assigned February 1990; DEMIL A (none required); unit of issue EA (each), $97.24 gov standard price; export Schedule B 8421.31.0000; ships at 2.8 lb / 0.0087 cu ft.