Rail End Cups
The pressed steel is much more solid than aluminum caps you will likely find at the local hardware store.
End Cup - Pressed Steel - Fits Tube Ends 1.315" Outer Diameter or 1.66" Outer Diameter
Pressed Steel End Cups are a strong, durable, and easy way to make a tube connection possible. This gives any High Tunnel, Hoop House, or Cold Frame owner / builder the ability to create structural wind and snow braces.
Use Self-Drilling TEK Screws to secure End Cups to a length of galvanized steel tubing. You will then be able to connect to another tube at any point along its length (shown in a picture above). Brace Bands, Nuts and Bolts, and Self Drilling TEK Screws are all available for purchase.
Shipping
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The pressed steel is much more solid than aluminum caps you will likely find at the local hardware store.
You can accomplish the same job these end cups perform in a few different ways, but these cups do it better and faster and probably a bit cheaper. Just about every tunnel should have 8 of these, 2 for each wind brace.