... :Carbon steel,iron,stainless steel 4.RoHS,SGS,Bolt We could make production of all kind of bolts,such ... made with 24 hours.HQ double bolt clamp,bolt certificate (RoHS,SGS) Specification: Products Nam: bolt,eyelet bolt,hex bolt,flange bolt,stud bolts,u bolts,lifting ... A449 A307 A394 etc. Material:: Stainless steel,Carbon steel,iron bolt AISI 1018 etc. Grade: 4.8-12.9 Finish: zinc ...