1″Gi back nut

a specific type of nut used in plumbing fittings. Let’s break down what each part of the description means:

1. 1″: This indicates the nominal size of the back nut. In this case, it’s 1 inch in diameter. This measurement corresponds to the size of the pipe or fitting it’s intended to be used with.
2. GI: This stands for “Galvanized Iron,” indicating the material the back nut is made from. Galvanized iron is iron or steel that has been coated with a layer of zinc to protect it from corrosion. This makes it suitable for use in plumbing applications, especially where exposure to moisture is a concern.
3. Back nut: A back nut, also known as a lock nut or jam nut, is a type of nut with a smaller profile compared to regular nuts. It’s designed to be tightened against another fitting to secure it in place, preventing it from loosening due to vibration or movement. Back nuts are commonly used in plumbing fittings to secure components like valves, faucets, or pipe connectors.