Grade 5 hex king bolt Surface :Zn yellow Machined and turned SGS ... years experience in fastener field 1,Name: Grade 5 hex king bolt;Hex king bolt;Grade 5 bolt2,For the similar bolt,what can ... this kind of bolt: Grade3.6,4.6,4.8,5.6,6.8,8.8,9.8,10.9,12 ... industry is machined hardware fastener ,especially the cutting/turning parts. Grade 5 hex king bolt