3b thread class right-hand 71.938" overall length 0.688" overall width 32 thread quantity per inch navy special project channel dyed blue anodize channel surface treated
3b thread class right-hand 0.450" overall width 28 thread quantity per inch end nuts have dimple on extended flange, holes are unequally spaced silver nut surface treated
Used on aircraft, phantom f-4;aircraft, eagle f-15. 3b thread class right-hand 72.000" overall length 0.452" overall width 32 thread quantity per inch passivate surface treated