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 4140-00-949-8572
NSN 7035-01-624-6076
NSN 6620-01-545-9837
NSN 6110-01-303-5837
NSN 5996-00-059-7061
NSN 6220-01-373-5918
NSN 5915-01-443-3881
NSN 6610-01-287-3678
NSN 6320-00-036-3688
NSN 5905-01-317-2474
NSN 5915-01-436-5907
NSN 6110-01-337-3232