The higher the pressure, the tighter the seal, creating a stronger grip. Lenz fittings have J.I.C. approval and meet all S.A.E. tube fitting standards. Components can be reused and remain leak proof no matter how often they are re-assembled. There is no concentration of stress due to metal-to-metal seal because the ferrules and flares are unaffected by vibration and the tube is held by the friction grip of split ring and nut.
O-RING SEAL HYDRAULIC TUBE FITTING