20 × M8 Nuts. 5 × M12 Nuts. 10 × M10 Nuts. 60 × M4 Nuts. 30 × M6 Nuts. 40 × M5 Nuts. - The locking nuts can be used for screwing on to bolts, as well as threaded rods and cap screws. The all-round transparent box makes it easy to see thread nuts inside even when stacked.