Bag of 20 M4 Nylock nuts.
These nuts are ideal for model cars and situations where vibration is a consern with nuts, as there glass-filled nylon insert will self lock the nut to the M4 screw giving a firm secure tight fit leaving the nut to not loosen through vibration etc.
The nuts are zinc plated for long life effect and rush protection.
Your S & R Text. Could be a copy of what is in shipping.php, a precis of it, a link to it, etc. Whatever you decide you need...