O-ring, face-seal fittings from Brennan Industries, Solon, Ohio, eliminate leaks in hydraulic systems, while permitting operating pressures as high as 6,000 psi. The fittings are available in 23 configurations and 35 size combinations. They serve in applications where elastomeric seals are acceptable to overcome leakage and variations in assembly procedures. The fittings connect to a range of tubing grades by silver brazing. They work in subzero to high temperatures and resist vibration and shock.