Available here are Kinmar® Permanent Nuts in A2 Stainless Steel. Kinmar® fasteners are the ultimate high security patented one-way nut. This patented permanent nut requires a matching driver socket for installation giving you guaranteed torque levels and can be re-torqued if required. Not governed by a shear point and leaving no unplated surfaces, it leaves a clean smart finish. This item is sold in a box quantity of 100. This is not a stock item therefore please allow 3-5 working days for dispatch. As this is not kept as a stock item, this is non-returnable. Click Here to view installation video. M5 Kinmar® Permanent Nut - A2 ST ST - Box of 100