OAR 837-061-0010: Threaded Couplings and Fittings

All equipment used for fire protection purposes , having hose couplings and fittings of nominal 1-1/2 inch inside diameter and larger, shall have threads designated “American National Fire Hose Connection Screw Threads.” The form, dimensions, tolerances, gauges, and overall design and construction of threads on threaded couplings and fittings shall conform to “National Fire Protection Association Standard No. 1963, 2019 edition.” [Publications: Publications referenced are available from the agency.]