A fitting used with a union nut and thread piece to form a union.
NSN 6620-01-647-8261
NSN 6650-00-970-8110
NSN 6150-01-503-1236
NSN 5998-01-298-7489
NSN 5910-01-337-4826
NSN 4140-00-578-7726
NSN 5855-00-973-5717
NSN 5975-01-655-6402
NSN 6645-01-170-5402
NSN 6145-00-953-7504
NSN 5945-00-001-9721
NSN 5960-00-304-8668