A fitting used with a union nut and thread piece to form a union.
NSN 5895-00-637-2658
NSN 6620-00-410-2638
NSN 5950-00-231-6204
NSN 6650-01-065-1704
NSN 6110-01-507-1191
NSN 6650-01-251-3370
NSN 5975-01-084-4027
NSN 5990-01-078-1294
NSN 5835-01-530-8919
NSN 5930-01-217-9675
NSN 5920-00-552-1567
NSN 6150-01-319-2630