Bridgeport 2-Hole Pipe strap has a trade size of 3-1/2 Inch and hole/bolt size of 7/16 Inch. It features durable steel construction and comes with zinc electro-plate finish. Pipe strap is used on rigid conduit and IMC applications. It measures 4.060 Inch x 7.500 Inch. Strap is UL listed and CSA certified. Also known as -Bridgeport 1909 2-Hole Pipe Strap 3-1/2 Inch Steel Zinc Electroplated