2a thread class right-hand 1.750" thread length hexagon head style 10 thread quantity per inch grade 5 zinc plated steel hex head cap screw material steel grade 5 zinc surface treated unc thread series
3a thread class right-hand 1.123" thread length hexagon head style 24 thread quantity per inch screw hex head cruciform recess full thread A286 cres 160000 psi tensile passivate surface treated unjf thread series