40QE3600M
Pipe Nipple
Mack

This pipe nipple is a short, threaded conduit used to connect two sections of pipe or hose within hydraulic, pneumatic, or fuel lines. The nipple provides a simple, compact method to extend pipe runs, repair a damaged section, or adapt fittings with compatible thread forms. Material selection (such as steel or brass) and thread size are chosen to meet system pressure, corrosion resistance, and temperature requirements. A proper nipple connection requires matching thread standards, correct torque during installation, and appropriate sealant or thread tape to ensure a leak-free joint. In tight spaces, the compact profile of a nipple can simplify routing and facilitate service access. Selecting the right length and thread engagement is critical to avoid cross-threading or leak paths that could compromise system integrity. Source One Parts Center.