The Coilhose 581 3/8" industrial coupler, 3/8" MPT, offers a durable connection for several years of good service. Also called a push-lok fitting, this air hose coupler includes a knurled body that enhances grip and has a drag guard, which prevents accidental disconnection. Also features industrial interchange and a Buna N Seals design. This manual air hose coupler has a versatile temperature range of -40°F to 250°F. It is built from plated steel material and includes a maximum input pressure range of 300 PSI. Made in the USA.