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90° flare fittings (O-Lok) are proven to be extremely effective in eliminating leaks at the higher pressures found in today’s hydraulic systems. This range is an O-ring face seal (O.R.F.S.) type fitting that consists of a nut, a body, an O-ring and a sleeve. Parker O-Lok® fittings come standard with a trapezoidal seal “Trap Seal”. O-Lok® fittings are suitable for a wide range of tube wall thickness and are also readily adaptable to inch or metric tubing and hose connections.