Used on spec item. 3a thread class right-hand 0.630" thread length double hexagon w/hole head style 0.042" hole diameter 32 thread quantity per inch unjf thread series
2a nut thread thread class right-hand nut thread 0.880" stud thread thread length 15.100" overall length 24 nut thread thread quantity per inch drilled hole 0.109 in dia located 0.156 inch from stud end unf nut thread thread series