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 6145-00-199-8066
NSN 5910-01-447-7322
NSN 5905-01-472-2366
NSN 6610-00-151-8074
NSN 5910-00-880-9223
NSN 2925-00-614-1758
NSN 6320-00-578-6898
NSN 5996-01-076-6548
NSN 5996-00-683-5176
NSN 6240-00-024-5086
NSN 6135-01-125-4867
NSN 5999-01-642-4190