Steel Screw Rods & Connector Nuts Menu Options Fully threaded metric studding bars. Each screw rod comes with 2 connector nuts. Sizes: M6, M8, M10 & M12. Standard metric pitch. Length: 300mm. Material: Bright zinc plated steel. For manufacturing, automotive and construction industries. Used for floor anchors, steel ground work, machine alignment etc. For other nuts and bolts please visit our shop.