Conform to asa standard b16.5
An item solid or split into halves, having a threaded or unthreaded hole for the purpose of connecting or retaining a pipe, tube, or hose fitting. The face of the flange may be smooth, grooved, or serrated and may be drilled for connecting bolts or studs. If the item is unthreaded, the pipe or tube may be retained by welding, brazing, compression, or the like. Excludes flange, pipe, blind; ferrule, grooved clamp coupling; and adapter (as modified).
Classification: Flanges of iron or nonalloy steel
NSN 5855-01-218-3735
NSN 4140-00-653-5245
NSN 2925-01-474-3363
NSN 5985-01-501-5651
NSN 5999-01-180-0294
NSN 4140-00-307-2732
NSN 5996-00-844-1091
NSN 5990-01-242-9653
NSN 5975-00-117-5630
NSN 5910-00-956-5810
NSN 6650-01-103-7342
NSN 6105-01-462-6111