The ETBB42 is a hook-profile tungsten bucking bar made for the rivets a rectangular bar cannot reach. It measures 6.3 inches long by 3.7 inches wide by 1 inch thick and weighs 5.15 lbs. This is a high-mass bar for the biggest solid rivets and structural backing where you want maximum inertia.

The density of tungsten packs heavy backing force into a smaller body than an equivalent steel bar, without the extra bulk. 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.

Made in the United States from high density tungsten, each bar is finished to protect the panels you set rivets against. 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 this bar’s detailed measurements and photos, and the full size and weight chart can help you compare it against other sizes and shapes.

Frequently asked questions

What jobs is the ETBB42 bucking bar best for?

It is a hook bar at 5.15 lbs and 6.3 by 3.7 by 1 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?

The density of tungsten packs heavy backing force into a smaller body than an equivalent steel bar, without the extra bulk. You get the backing mass you need without a heavy, bulky steel bar to wrestle.

Is the ETBB42 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.