What you’ve been looking for is a Post Pro.

Post Pro is the best pipe-to-post installation system on the market. By using the Post Pro, you can eliminate concrete and mount your posts on steel. Are you wasting time and money with inferior adapters?Whether you’re a fabricator, contractor or do-it-yourselfer, buy the Post Pro, direct from the manufacturer—the best adapter on the market.You may know it as a post collar, post socket, post adapter, post locator, pipe-to-post connector, donut, or even a whatchamacallit, gizmo or “that black thing over there.”