Our SealTight Flangeless Nut design makes high pressure flat-bottom 1/16″ OD tubing connections possible. It’s unique design minimizes tubing twists and typically is tightened only 1/4 turn past the point of initial compression. It has a 1/4-28 Flat-Bottom port configuration and is for 1/16″ OD tubing. It is made from chemically resistant Delrin and is blue. Brochure