Used on ng nav system. 3a thread class right-hand flush countersunk head style 0.3075" grip length 32 thread quantity per inch 7060 double pounds per square inch shear strength pin, threaded, hex point drive solid film lubricant per mil-l-46010 "kal-gard" type "fa" or hi-kote 2 only unjf thread series
3a thread class right-hand 0.425" thread length flat countersunk head style 0.688" grip length 28 thread quantity per inch aluminum surface treated unjf thread series