These 3/8 in hose barbs feature a steel drag guard to prevent accidental uncoupling. M-Style couplers offer a basic flow size of 1/4 in and have a maximum inlet pressure of 300 psi. Designed specifically for Milton push-on and lock-on air hoses, these hose barbs require no clamps or ferrules, simply push the fitting in. brass body with a Buna-N seal.