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 2925-01-090-2391
NSN 6145-00-959-0097
NSN 5990-01-122-9149
NSN 6320-00-164-4087
NSN 5925-00-315-2238
NSN 5996-01-127-5431
NSN 6320-01-436-9228
NSN 6240-01-462-1874
NSN 5950-00-011-9729
NSN 5855-00-235-2676
NSN 5990-01-140-5497
NSN 5985-01-612-1737