Foundation Bolt (Anchor or L-Bolt) M12 x 250 mm Galvanised Mild Steel L Bolts have many uses but are often used to attach a plate member to concrete foundation (foundation bolts) , provide anchorage for lightweight post bases (anchor bolts), and for general anchorage to concrete Supplied without nuts and washers so you can choose the best to suit your needs (please ensure you use tapped over size nuts to allow for the galvanising layer) Galvanised Mild Steel D (mm) = M12 L (mm) = 250 S (mm) = 50 T (mm) = 36 R (mm) = 12 T316 Stainless Steel is suitable for anywhere you would use T304 BUT has the added advantage of being suitable for marine solutions. The molybdenum increases the corrosion resistance to withstand attack from many industrial chemicals and solvents and of course chlorides Tolerance on dimensions +/- 1 mm. Please note that as we use roll threading, the bar diameter is slightly less than the thread diameter