2a thread class right-hand 1.500" thread length button head style 11 thread quantity per inch finish color black oxide surface treated unc thread series
3a thread class right-hand 0.400" thread length 28 thread quantity per inch square socket drive 0.260 in. width 0.225 in. depth head end, one hole 0.076 in. diameter 0.750 in. from bearing surface of head unf thread series
3a thread class right-hand 2.060" thread length flat countersunk head style 20 thread quantity per inch one 0.069 in. dia hole thru shank located 0.710in. from head unf thread series
