Ốc Vặn Thùng Quay Đá (Ren M6)

This is a replacement barrel nut for the Harbor Freight 3lb dual barrel rock tumbler. It uses a heat set insert with a M6 thread. This replaces the original barrel nut if you lose one or something happens to it. There are two models. One replaces the original as close as posible, the second changes the barrel nut to be easer to losen / tighten. 

I printed these in PETG, and had to adjust the opening for the insert a bit o account for shrinkage of the part. Depending on the printer and material you may need to do the same. 

STEP files are included for easy remixing. One of the images shows the type and dimensions of the heat set inserts I used for this project.