Check Valve / Relief Valve 5/16" Dia- 303 SS- 1/2 PSI open- Precision Check Valve -5/16-

One Premium Check Valve / Relief Valve by Precision Check Valve. Can be used for one way flow or pressure relief at 0.5. PSI. Made in the USA Size = 5/16" Dia.- (installs in 1/4" hole with it's o-ring seal). Machined to perfection! No more leaking plastic check valves! Body Material 303 Stainless Steel  Spring Material 316 SS O-ring Material Nitrile (Buna-N) Opening Pressure= 1/2 PSI (other pressures available up to 70 psi) By Precision Check Valve Model G312-SB-0.5