Choose from our selection of 90 degree brackets, including brackets, machine brackets, and more. Looking for brackets or something to attach two 4x4s at 90 degrees to each other. This is example of false advertising and they make and ship them at 93 degrees for the convince of the manufacturer and Home Depot. They are not 90 degrees so they are very difficult use. Simpson Strong-Tie RPBZ ZMAX Galvanized Retrofit Post Base for Double 2x4 Nominal Lumber (84) $ 4 89. Choose from our selection of 90 degree braces, including brackets, sensor and switch mounting brackets, and more. The way I've been nailing this scenario is to just nail through the vertical 2x4 at a 0 degree angle, directly into the middle of the end piece of the horizontal 2x4. One of the biggest benefits of using a 2x4 Basics shed kit to craft your shed is that no expert carpentry skills are required. Nail the horizontal 2x4 into the vertical 2x4 about 1/4 of the way down from the top of the vertical 2x4, so they are at a 90 degree angle. While you do provide your own wood, only straight, 90-degree angle cuts are necessary when you use 2x4 Basics connecting brackets… Basically building a free standing pullup frame with two "feet" made from 4x4s laying flat on the ground and two 4x4s posts running 90 degrees … In stock and ready to ship. ... 90 degree bracket 90 deg bracket … In stock and ready to ship.