This is a bracket for securing plastic tubs, milk crates, or other containers with 1" ratchet strap. There are two STL files - the bracket itself, and a backplate that can be used for milk crates, or other containers that don't have a solid surface.

Note the notched side of the bracket goes to the inside, with the strap within it. Mounting holes are setup for a #8 bolt or machine screw.

For solid tubs, just one bracket without backplate is required, which I mounted with #8 x ½" machine screws.

For milk crates or other non-solid surfaces, the backplate is used on the inside to provide a mounting surface for the screws.

For surfaces that are not smooth, such as a milk crate, two brackets can be used face-to-face, to prevent pinching the strap.