2a thread class right-hand 0.767" thread length hexagon head style 24 thread quantity per inch finish 1.9.2.3 of mil-std-171, except .0003 thick. supplementary chromate treatment to be bronze or olive drab in color unc thread series
2a thread class right-hand 0.750" thread length pan no. 2 head style 20 thread quantity per inch cadmium or zinc screw surface treated unc thread series
2a thread class right-hand 0.318" thread length round with wrench flats head style 32 thread quantity per inch oxide screw surface treated unc thread series
