Used on allis-chalmers model 645m scoop loader with 2-1/2 cubic yard multi-purpose bucket. 2a 1st end thread class 24 1st end thread quantity per inch nptf 2nd end thread series
Used on aircraft, f-16. 3a 1st end thread class 27 2nd end thread quantity per inch used on grumman A10 aircraft; weapon system essential anodize inside surface treated anpt 2nd end thread series