... pumps, compressors, hydraulic presses & machinery, motors, winches, Where vibration occurs & pressure fluctuates constantly.1-1/2”(40 mm), 2”(50mm), 2 ... dial sizes availableBottom or back connection, front and back flanges, u-clamps.Vacuum to 10,000 psi, other special connection thread ... or stainless steel systemsMany different stem lengths, connections and configurations pressure gauge pressure meter