A fitting used with a union nut and thread piece to form a union.
NSN 2925-01-632-5913
NSN 6240-00-442-6327
NSN 5915-00-542-2179
NSN 6610-01-307-6363
NSN 6620-00-273-8735
NSN 5999-01-422-2962
NSN 5910-00-699-6391
NSN 6150-01-127-3334
NSN 6145-00-990-9700
NSN 6320-01-082-2970
NSN 6110-01-211-6577
NSN 6220-01-071-8437