Parker tube fittings and adapters have been the most recognized brand of high pressure inch and metric tube fittings for over 75 years. Brands you recognize like Triple-Lok, Seal-Lok and EO/EO-2 Parker metric fittings. Parker offers conversion adapters of all types and sizes to maintain many of today's hydraulic tube fitting systems from all over the world. We have the widest selection available anywhere. And, in-stock.