Aeroquip FD35 series quick connects are designed for high pressure applications such as on hydraulic jacking equipment commonly found in construction, railway maintenance and house moving industries. They are considerably faster to use than the traditional thread-together jack hose quick connects. They have a large number of locking balls to distribute the work load evenly while providing alignment and swiveling action to reduce hose torque and prolong hose life. (CAUTION: These products are not to be used as swivels. Rotation under pressure will result in excessive and premature wear). Aeroquip FD35 Series are compatible with Parker TC Series Jack Hose Quick Connects. They are made from solid steel barstock and have a Viton seal with a PTFE back-up ring. Dust caps & plugs are available upon request.