Used on 3990-01-406-1340 improved pls flatrack. 3a thread class right-hand 0.063" thread length hexagon head style 11 thread quantity per inch bolt-tiedown oxide surface treated unc thread series
3a thread class right-hand 0.656" thread length hexagon head style 0.070" hole diameter 14.937" grip length 20 thread quantity per inch unf thread series
3a thread class right-hand 2.330" thread length hexagon head style 0.070" hole diameter 28 thread quantity per inch cadmium surface treated unf thread series