2a thread class right-hand 0.514" thread length drive head style 32 thread quantity per inch passivate screw surface treated head with molded washer, nylon per mil-m-20693; epoxy coated head unf thread series
flush (flat) countersunk (included angle - less than 135 deg w or w/o chamfer) head style unit of issue change from each to pound (lb) : 1 lb = 708 ea.
2a thread class right-hand 1.750" thread length 20 thread quantity per inch shoulder 0.047 in. thk by 0.438 in. dia 1.750 in. distance from thread end zinc surface treated off-set round bend unc thread series