Hydraulic Flanges & Components | Parker
The Parker 4-bolt flange connections conform to SAE J518 and ISO 6162-1 and -2. Flanges are proven leak-free connections especially suited for larger sizes, higher pressures, and assembly in tight quarters. Large threaded port connections (such as SAE straight thread) require very high torque to assemble. This makes assembly difficult, especially where wrench clearance is limited. Flange connections solve this problem by dividing the hydraulic load among four bolts each requiring much less torque, smaller wrenches and smaller wrench clearance.