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 6320-01-532-7491
NSN 5930-00-860-9195
NSN 5915-00-570-9289
NSN 6135-00-452-2266
NSN 5960-00-615-8001
NSN 5975-01-329-1505
NSN 5975-00-337-6653
NSN 5945-01-555-8373
NSN 5925-01-184-0633
NSN 5975-00-983-0111
NSN 6220-00-700-1314
NSN 5960-00-553-5794