Screw on both ends of the alphabets U-shaped shaped letters, primarily used to secure plumbing (pipes, etc.) to a mount or bracket. This is the most common support for plumbing support in terms of ease of installation, solid support, stability and strength. U-bolts are primarily used to secure pipes (pipes, steel pipes), etc. For that reason, parts and nuts on the other side are required to secure outside of the U-bolt body. Plumbing (pipes and steel pipes) are often used outdoors, so we recommend using stainless steel to prevent rust when using U-bolts.