A-Lok fittings are precision compression fittings used to terminate and route rigid tubing in hydraulic and fluid systems. Key product types include compression tube fittings, adapters and elbow fittings, featuring the Parker Hannifin A-Lok series. Parker A-Lok fittings provide consistent make-up and secure tube retention through a two-ferrule compression principle. Common designs include straight connectors, tees and elbows for inch-based tubing and standard thread interfaces. The range supports defined pressure classes and dimensional tolerances for reliable installation. Original Parker A-Lok fittings are supplied with professional technical support and fast worldwide delivery.