Used on m929 / m930 6x6 5-ton dump truck, m818 / m931 5-ton tractor truck, m939 series truck. an/tpq-36 firefinder radar set. an/uyq-3a airborne mobile dir air spt ctl (2id),(02m jul83).. 2a 1st end thread class cadmium surface treated nptf 2nd end thread series
Used on aircraft application. 3a all ends thread class 12 1st end bulkhead thread quantity per inch two opposite hex flats marked with equilateral triangles to denote precision type anodize inside surface treated unj 1st end bulkhead thread series