3a 2nd end thread class second end has filter screen, 200 microns rating, material 304l cres passivate inside surface treated unf 1st end thread series
3a 2nd end thread class 16 2nd end thread quantity per inch bulkhead, unjf, 0.750 in thd size, 3a class anodize outside surface treated unjf 2nd end thread series
Used on aircraft application. 3a 2nd end thread class 12 1st end bulkhead thread quantity per inch anodize surface treated unj 1st end bulkhead thread series
