Connect pipe to pipe in low- to high-pressure applications. Pipe and fittings are measured by pipe size, which is an industry designation, not an actual measured size like hose, tubing, and duct. Pipe is typically rigid.

Also known as zero-backlash couplings, these transmit the exact same speed between shafts during speed or directional changes, resulting in repeatable, precise positioning. Use them for precision motion-control applications involving servomotors and encoders.

These U-joints are made of steel or plastic.