The ETBB46 is a classic straight tungsten bucking bar, the everyday choice for backing solid rivets on accessible flat panels. It measures 6 inches long by 1.1 inches wide by 1 inch thick and weighs 4.2 lbs. The extra mass makes it well suited to larger rivets and jobs that need a firm, stable backing.

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 guide to bucking bar shapes can help you compare it against other sizes and shapes.

Frequently asked questions

What jobs is the ETBB46 bucking bar best for?

It is a straight bar at 4.2 lbs and 6 by 1.1 by 1 inches. The extra mass makes it well suited to larger rivets and jobs that need a firm, stable backing.

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 ETBB46 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.