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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 short in length and comes in black.