3a thread class right-hand 0.658" thread length pan head style 32 thread quantity per inch cadmium screw surface treated furnished with boot type nylon washer 0.500 in. o/d, color gray per fed. std 595 no. 16231 unf thread series
Used on f-101 engine. 3a thread class right-hand 0.667" thread length double hexagon extended washer head style 28 thread quantity per inch unjf thread series
3a thread class right-hand 0.337" thread length pan no. 2 head style 0.177" grip length 32 thread quantity per inch internal drive ribbed passivate surface treated unjf thread series
3a thread class right-hand 0.381" thread length oval countersunk head style 0.240" grip length 32 thread quantity per inch aluminum surface treated unjf thread series
