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 6130-01-320-6794
NSN 6685-01-633-6915
NSN 6610-00-099-4096
NSN 2925-01-078-7854
NSN 6135-01-539-1167
NSN 6105-01-257-7891
NSN 5895-01-003-4596
NSN 6135-00-240-3200
NSN 7035-01-260-0804
NSN 5855-00-631-4565
NSN 6610-01-358-7582
NSN 5895-00-671-1250