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 2925-00-707-6770
NSN 5835-01-647-6426
NSN 6110-00-239-9248
NSN 7035-01-396-3343
NSN 5999-01-567-9406
NSN 4140-01-206-4981
NSN 6145-00-755-7010
NSN 2925-01-267-1598
NSN 2925-00-960-4737
NSN 6610-01-263-5517
NSN 5990-00-234-0119
NSN 5855-01-631-2118