The ETBB08 is an offset tungsten bucking bar for structure where you need to step around a flange to reach the work. It measures 6 inches long by 1.5 inches wide by 1.5 inches thick and weighs 6 lbs. This is a high-mass bar for the biggest solid rivets and structural backing where you want maximum inertia.

Tungsten alloy runs about two and a half times denser than steel, so this bar backs a rivet like a much larger steel tool of the same shape. In a cramped bay that means less bar to hold and position, a steadier rebound behind the rivet set, and less hand and wrist fatigue over a long session.

Every bar is machined in the United States from high density tungsten and finished smooth so it will not mar the surrounding skin. It is a dependable pick for aircraft assembly and repair, restoration and experimental builds, and any solid rivet work where control and access matter.

To be sure this is the right bar for your rivet pattern, USA Tungsten publishes full specifications for this exact bar, and why tungsten beats steel for bucking can help you compare it against other sizes and shapes.

Frequently asked questions

What jobs is the ETBB08 bucking bar best for?

It is an offset bar at 6 lbs and 6 by 1.5 by 1.5 inches. This is a high-mass bar for the biggest solid rivets and structural backing where you want maximum inertia.

How is a tungsten bucking bar better than steel?

Tungsten alloy runs about two and a half times denser than steel, so this bar backs a rivet like a much larger steel tool of the same shape. You get the backing mass you need without a heavy, bulky steel bar to wrestle.

Is the ETBB08 made in the USA?

Yes. It is machined in the United States from high density tungsten alloy and finished so the working faces will not scuff aluminum skin.