3a 1st end thread class 2 2nd end bolt hole quantity 3a 1st end thread quantity per inch w/one lock wire hole 0.062 in. id located 1.625 from flared end enamel outside surface treated un 1st end thread series
Used on champion pneumatic,air compressor. 3b 1st end thread class 2 2nd end bolt hole quantity 16 1st end thread quantity per inch paint outside surface treated npt inlet thread series