... size:M3-M22 3Bolt material:Carbon steel 4.Effect:Connection,Fastening Export carbon steel hex bolt and ... DIN931,DIN934 Material:: Carbon steel,stainless steel Grade: 4.8-12.9 Finish: zinc,black,chrome,nickel,yellow ... Quantity: More than 50MPCS Shipment Port: SHANGHAI OR NINGBO Delivery Time: The fastest 20-30days,According ... -86001620Postal Code:325001 Stainless steel or carbon steel hex bolt and nut