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 5998-01-634-0604
NSN 6220-01-545-3562
NSN 5998-01-181-1317
NSN 6650-01-170-5440
NSN 5925-00-031-4108
NSN 5895-01-119-8151
NSN 6135-01-495-0933
NSN 5975-01-126-0180
NSN 5920-00-738-8074
NSN 5930-01-023-8144
NSN 6130-00-522-0334
NSN 6320-01-512-2031