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 5855-01-620-0629
NSN 5920-01-479-9605
NSN 5965-00-055-8013
NSN 5965-00-226-7870
NSN 5855-01-058-6687
NSN 6150-01-266-3588
NSN 6650-01-200-3293
NSN 5985-01-586-0240
NSN 5996-01-141-5435
NSN 5905-01-617-1816
NSN 5999-01-453-9486
NSN 5905-01-571-7188