flush (flat) countersunk (included angle - less than 135 deg w or w/o chamfer) head style 0.080" grip length may be slosh cleaned with mil-c-38736 cleaner before installation passivate surface treated
2a thread class right-hand 0.542" thread length fillister head style 24 thread quantity per inch cadmium fastener or zinc fastener surface treated unc thread series
3a thread class right-hand 0.270" thread length flat chamfer head style 32 thread quantity per inch navy special project passivate surface treated unc thread series
right-hand 14.0mm thread length hexagon head style fused red or yellow patch locking patch per GM9093-p, cagec 63005 phosphate fastener surface treated m thread series
Used on propeller hub onboard 378 ft whec coast guard vessels. 2a thread class right-hand 3.750" thread length hexagon extended washer head style 4 thread quantity per inch unc thread series
