3b thread class right-hand flat countersunk undercut head style 28 thread quantity per inch color identification yellow top surface of head furnished w/ o-ring cadmium surface treated
3b thread class right-hand flat countersunk undercut head style 32 thread quantity per inch identification color orange furnished w/ o ring cadmium surface treated
3b thread class right-hand flat countersunk undercut head style 32 thread quantity per inch identification color yellow furnished w/ o ring cadmium surface treated