Interstate Pneumatics CPT44-5 Five-Way Brass Compressor Fitting 1/4" FPT (5). The cross fitting has four openings positioned at 90-degrees from each other for connecting and branching four pipes. It has female National Pipe Taper (NPT) threads for connecting to male threaded pipes, creating a tighter seal than straight threads. This fitting is made of brass for corrosion resistance, ductility at high temperatures, and low magnetic permeability. Brass can be connected to copper, brass, plastic, aluminum, and welded steel. The bar stock cross has fair vibration resistance and is suitable in low to medium pressure applications.