C-5 ball valve used at various points in the truck air system such as at gladhands and air reservoirs. 1/2 inch female pipe threads both ends. 1/4 turn handle full off to full on. Rated 450 PSI max. P/N 285172. NSN 4820004205499. Fits various vehicles such as M35A2, M54A2, M809, and M939, M915, M916 series.