The ETBB13 is a classic straight tungsten bucking bar, the everyday choice for backing solid rivets on accessible flat panels. It measures 4 inches long by 1 inch wide by 0.625 inches thick and weighs 1.55 lbs. It is a versatile everyday size for general airframe and sheet metal riveting.

Because tungsten is far denser than steel, it delivers the rebound mass of a steel bar well beyond its size. 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.

It is machined in the USA from high density tungsten alloy and dressed so the working faces stay smooth against aluminum. 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 the complete spec sheet for this size, and why tungsten beats steel for bucking can help you compare it against other sizes and shapes.

Frequently asked questions

What jobs is the ETBB13 bucking bar best for?

It is a straight bar at 1.55 lbs and 4 by 1 by 0.625 inches. It is a versatile everyday size for general airframe and sheet metal riveting.

How is a tungsten bucking bar better than steel?

Because tungsten is far denser than steel, it delivers the rebound mass of a steel bar well beyond its size. You get the backing mass you need without a heavy, bulky steel bar to wrestle.

Is the ETBB13 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.