The Coilhose 583 3/8" industrial manual air hose coupler, 1/4" MPT, offers a durable connection for years of service. Also known as a push-lok fitting, this plated steel air hose fitting includes a knurled body that enhances grip and a drag guard, which prevents accidental disconnection. Also features industrial interchange and a Buna N Seals design. This industrial air hose coupler has a temperature range of -40°F to 250°F. It includes a maximum input pressure range of 300 PSI. Made in the United States.