Robuta

https://www.throttleaddiction.com/collections/bungs-fittings
Weld in steel bungs are great for a variety of uses when building your custom motorcycle project.  They're essential for mounting fenders, building sissy...
for aweldsteelbungsgreat
https://www.mcmaster.com/products/bungs/thread-type~ngo/
Choose from our selection of NGO bungs, including over 2,600 products in a wide range of styles and sizes. Same and Next Day Delivery.
mcmaster carrngobungs