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 6620-01-349-8685
NSN 6320-00-583-3105
NSN 6145-00-918-0809
NSN 6150-01-351-6152
NSN 6130-01-046-5238
NSN 5895-00-537-4231
NSN 5975-01-076-3656
NSN 6150-00-753-3950
NSN 6610-01-561-4139
NSN 6220-00-102-9683
NSN 6135-00-269-5843
NSN 5985-01-534-4037