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 5998-00-510-9157
NSN 6240-00-488-0278
NSN 6685-00-995-1624
NSN 5999-00-155-8066
NSN 5996-01-040-2606
NSN 5990-01-286-0601
NSN 5950-01-351-9924
NSN 5960-00-897-5744
NSN 6105-01-508-6636
NSN 5945-01-428-8835
NSN 2925-00-156-5633
NSN 6130-01-125-3958