Custom Made High Quality Steel Joint Muff Best Precision Industrial Limited Base Info Material:High Strength SteelType:Round HeadConnection:Hinged BoltsHead Style:RoundStandard:DINGrade:12.9 Description Pre:T Bolt Screw Fastener Tool for T-Slotted Aluminum Profile System Carbon Steel Next:Hex Head Screws Bolts, Nuts, Extra-Large and Thick Flat & Lock Washers, Fully Threaded, Stainless Steel, Plain Finish