Piston nut Piston nuts are made of various materials, depending on their strain and purpose. We can manufacture piston nuts for various piston rod sizes and designs. You May LikeReciprocating Compressor CrankshaftOil Scraper RingCompressor Connecting RodCompressor Cylinder LinerCompressor Plate ValveCompressor Poppet ValveReciprocating Compressor Piston Rings