3a thread class right-hand 0.544" thread length hexagon head style 0.673" grip length 28 thread quantity per inch added a to dash number for undrilled bolt. passivate surface treated unjf thread series
3a thread class right-hand 1.360" thread length flat chamfer head style 20 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 0.767" 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
Used on pacer dawn. 3a thread class right-hand 1.000" thread length flat fillister head style 0.044" hole diameter 28 thread quantity per inch passivate surface treated unrf thread series