A fitting used with a union nut and thread piece to form a union.
NSN 5895-01-626-1742
NSN 5905-01-500-2135
NSN 5998-01-456-8576
NSN 5998-00-583-1616
NSN 5985-00-069-6570
NSN 4140-01-301-7336
NSN 4140-01-344-7135
NSN 5985-00-677-4432
NSN 6145-01-139-2158
NSN 6220-01-092-5177
NSN 6645-01-445-2841
NSN 5999-00-241-9731