Brass hose barb fittings. Rigid male adapter. Hose I.D. x MNPT. Barb size is hose I.D. Used with plastic tubing or rubber hose. Barbed edges provide positive connection. Excellent vibration resistance. Temperature range: -40°F to +160°F (Lead free fittings: -40°F to +200°F). Working pressure: 150 psi maximum. These fittings are intended for use with hose clamp, similar clamp, or a crimped ferrule.