Used on spec item. 3a thread class right-hand 0.438" thread length flat countersunk head style 32 thread quantity per inch cadmium screw surface treated unc thread series
3a thread class right-hand 0.641" thread length flat countersunk head style 16 thread quantity per inch oxide fastener surface treated unc thread series
3a thread class right-hand 0.291" thread length flat countersunk head style 2.365" grip length 28 thread quantity per inch cadmium surface treated unjf thread series
3a thread class right-hand 0.450" thread length button head style 40 thread quantity per inch navy special project zinc fastener surface treated unc thread series
Used on pacer dawn. 3a thread class right-hand 0.458" thread length double hexagon extended washer head style 28 thread quantity per inch used on tfe-1042 unjf thread series