Cross section is diamond shape
NSN 6650-00-030-2257
NSN 6650-01-542-9495
NSN 6240-01-331-5246
NSN 6320-01-113-7647
NSN 5935-00-963-0053
NSN 2925-01-317-6973
NSN 2925-01-397-2495
NSN 5835-00-969-5771
NSN 5935-00-494-3406
NSN 5975-01-633-8182
NSN 5910-00-412-4482
NSN 6135-01-622-1296