2" x 4â Rectangle End Cap Tube Pipe Inserts Rectangular Tube Plugs Black matte clean finish HDPE Key Specifications: Top Size:Â 2â x 4" (51mm x 102mm) Over Height:Â 5/8" Compatible Inside Square Tube Dimensions: (1.62 to 1.75) x (3.62 to 3.75 id) Compatible Thickness Range:Â 8-12 gauge (Fits tubing with wall thickness of .164-.109) Size Based on Outside Dimensions: These caps are designed based on the outside dimensions of rectangle tubes. The plug insert end is about 1/8-1/4" smaller to fit inside dimensions, while the top dimension of the plug matches the OD dimension of the tube. Whether you're working on furniture, shelving, rack systems, or any other project that utilizes square tubing, these plugs are a must-have.
eBay