Parker CPI Series Male Connector, 1/4 in. Tube OD x 3/8 in. Male NPT, 316 Stainless Steel

The Parker 4-6 FBZ-SS takes 1/4 in. tube straight into a 3/8 in. male NPT port on one 316 stainless body. One fitting, one seal to make, no bushing hiding behind the connection.

This is the size pair you meet on older instrument stands and vessel ports drilled a step larger than the tubing that feeds them. Bushing across that gap adds a threaded joint you will eventually chase with a soap bottle. Buying the right connector removes the problem at the source.

Parker’s CPI single-ferrule end grips the tube and seals against the body in one action, so make-up is quick and the joint remakes cleanly after you pull an instrument. Collins-Oliver stocks Parker CPI in Baton Rouge for same-day pickup. Call (800) 247-5756.