Review on Uxcell Thread Protectors Rubber Flexible Fasteners in Collated Fasteners by Ryan Gilliam

Purchased 20mm caps to protect the ends of 22mm hand truck axles from being scratched by anything they rub against. They rub against something they immediately remove, leaving the axle threads open again. Although I made 10% less, you might need even less if you want useful protection for the threaded ends.