Pneumatic Fittings, Plastic Push in Fittings (PT, R, BSPT, NPT) come in a variety of types, moulds and sizes to satisfy various tube demands. Accept metric and inch tube, and PT(R, BSPT), NPT thread. Working pressure from 0~1.0Mpa (0~150psi), Working temperature from 0~60ºC (32~140ºF).