BlackHawk Hydraulic Nuts

BlackHawk™ Hydraulic Nuts

Our Blackhawk Hydraulic Nuts embed hydraulic technology within the nut itself, providing a self-contained system for your bolt-tensioning applications. Ideal for flanges that require 100% tensioning, have small spacing between bolts, or have short stud length above the nut, Blackhawk Hydraulic Nuts almost have more advantages than we have room to list here. They will save you time and money by eliminating galling and reducing task time, downtime, and labor costs. They will increase worker safety by reducing exposure, eliminating pinch points, and eliminating nut splitting, machining, and hot bolting.

With 100% simultaneously loading, they offer the most accurate load and ideal gasket stress, eliminating leaks on your most important flanges. Proven in the industry, Blackhawk Hydraulic Nuts have been utilized by the largest nuclear plant in North America, the largest chemical company in North America, and private space exploration companies. Find out how Blackhawk Hydraulic Nuts can be customized to fit your unique applications today.

BlackHawk Hydraulic Nuts is a patented product of INTEGRA Technologies. Visit our patents page to learn more!

BlackHawk Hydraulic Nuts



Install on Existing Studs

BlackHawk Hydraulic Nuts on studs

To start, BlackHawk Nuts are installed on existing studs in place of the standard hex-nut.

Activate the Hydraulic Pump

BlackHawk Hydraulic Nuts connected together

Quick-connect hydraulic hoses are attached in series to each BlackHawk Nut and then connected to a single hydraulic pump. With the BlackHawk Nuts connected together in a closed hydraulic circuit: the operator safely activates the hydraulic pump to the desired pressure in a hands-free tightening process.

Turn the Locking Collar

Bolt load mechanically locked

The pump pressure produces a force that stretches the bolt evenly across all BlackHawk Nuts. The bolt-load is then mechanically locked into place by turning the locking collar on each BlackHawk Nut by hand until it stops.

Release the Pressure

Pressure released from the pump

The operator steps away from the flange and releases the pressure from the pump. Then hoses are removed followed by the hydraulic nipples, and the holes are plugged.

Specifications & Dimensions

BlackHawk™ Hydraulic Nuts are customized to meet your unique needs. As such, metallurgy, fitment, and sizing flow from the application details, environment, and customer priorities.

BlackHawk™ Hydraulic Nuts | How It Works

BlackHawk Hydraulic Nuts | Application Feature: Reactors

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