... washers; OEM from China; Certification:ISO14001:2004 ISO9001:2008 Specifications Red anodized aluminum bolts washers Process Capablilities Standard ISO, GB, DIN ... 9, 12.9 etc.Size M0.8~M12Material Stainless, Steel,Brass, Steel,Bronze, Iron,Aluminum,Carbon steel,Alloy steel, silicon bronze ... for future business relationships and achieving mutual success! certificate Red anodized aluminum bolts washers