A fitting used with a union nut and thread piece to form a union.
NSN 6220-00-184-6179
NSN 5975-01-212-8668
NSN 5855-00-821-7512
NSN 6145-01-411-0100
NSN 5990-00-900-4459
NSN 5835-01-345-3718
NSN 6240-00-306-9214
NSN 7035-00-371-7749
NSN 4140-01-611-9973
NSN 5960-01-202-6610
NSN 6645-00-171-9639
NSN 6650-01-131-8626