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 6130-01-272-9007
NSN 5905-00-937-8967
NSN 5998-01-412-0727
NSN 5945-01-415-3654
NSN 5999-01-447-8877
NSN 5998-01-271-4255
NSN 5945-01-380-6314
NSN 5835-01-167-1824
NSN 6320-01-078-8257
NSN 5920-01-318-7799
NSN 6685-01-396-4080
NSN 5905-01-110-6980