Backpack belt strap Buckles
thingiverse
This is a versatile backpack buckle that's suitable for most backpacks. Some buckles are non-removable, with one end of the strap passing through them and unable to be detached. I've encountered issues with my own backpack, which has broken due to this design. Fortunately, this alternative uses a standard M4 screw and nut to secure the strap in place, making it incredibly strong and durable.
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