Parker 32PTC Series straight unions are ideal for connecting two straight sections of tubing or pipes together. These fittings are made of high-quality brass, providing durability, corrosion resistance and tolerance to high temperatures and pressures. They feature a unique collet design to provide a positive grip on the tubing and have threaded interiors that ensures a leak-proof connection. These push-to-connect fittings have an O-ring seal (Buna-N) to prevent fluid or gas leaks between two surfaces and are used in air brake systems on semi-trucks, buses, trailers, mobile equipment and farm instruments.