Toolzone 146 piece nylon lock nut assortment in plastic storage case 146 piece assortment of 6 popular sized lock nuts ideal for high vibration applications nylon insert eliminates the need for a lock washer and still provides the same secure hold sizes 35 x m4 35 x m5 25 x m6 25 x m8 16 x m10 and 10 x m12 colour silver