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The Holyoke Fittings U1-4D is a brass connector suitable for various applications like hydraulic and pneumatic systems. This fitting is built from solid brass and works well with copper, brass, aluminum, and steel hydraulic tubing. It can manage vacuum pressures up to five thousand psi based on size, materials, and conditions.
This connector features long dryseal pipe threads to reduce leakage. It allows enough clearance for tightening flare nuts and is designed for make and break functionality, providing good vibration resistance. The fitting is economical and straightforward to assemble.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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