Need an extra nut? How about an E.T. plastic boombolt nut. Deez nuts are hard plastic that has a good grip made into them, so they don’t require a tool to go on or off. They have M16x1.5 threads so they should work on all boombolts with exposed thread. They are made to be a tight fit so they don’t back off during a race. color will depend on suply.
E.T. Boom bolt nut
$7.00Price