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 5985-01-540-3343
NSN 6150-01-043-1751
NSN 6650-01-317-2101
NSN 6240-01-481-1796
NSN 5905-01-570-6765
NSN 6685-01-505-2579
NSN 6110-00-706-8661
NSN 5920-00-142-9993
NSN 5910-01-358-3954
NSN 2925-01-522-1134
NSN 5835-01-010-3103
NSN 6150-01-386-1831