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 4140-01-421-3698
NSN 6685-00-847-0010
NSN 5950-01-199-9723
NSN 5996-01-216-0702
NSN 5905-01-510-9397
NSN 5960-01-141-7584
NSN 5990-00-451-7630
NSN 6650-01-337-8666
NSN 6105-00-957-9252
NSN 5999-01-359-1163
NSN 5950-00-951-1520
NSN 6110-01-481-3682