The ETBB11 is an offset C-channel tungsten bucking bar for backing rivets along a raised edge, flange, or channel a flat bar cannot straddle. At 1.75 lb and 2.5 x 1.25 x 1 inches, it brings the backing mass of a much larger steel bar to the rivet, so shop heads form clean with less shock to your hand.
A slot machined across the bar lets it sit over a flange or land while dense tungsten backs the rivet tail squarely. At roughly 2.5 times the density of steel it holds the work without bouncing, so shop heads form clean with less hand and wrist fatigue.
- Dimensions: 2.5 x 1.25 x 1 in
- Weight: 1.75 lb (medium)
- Shape: Offset
- Best-fit access: raised edges, flanges, and channels
Request a quote for current pricing and lead time.
Compare every bar on the size and weight chart, match a competitor part on the cross-reference, or get a recommendation from the Selector.
Questions about this bar
What is the ETBB11 tungsten bucking bar used for?
The ETBB11 is a offset tungsten bucking bar for stepped and recessed structure, where the offset steps the working face away from an obstruction to reach the rivet. Hold it flat and square against the rivet tail so the shop head forms evenly.
How much does the ETBB11 bucking bar weigh and what size is it?
The ETBB11 weighs 1.75 lb and measures 2.5 by 1.25 by 1 inches. You buy a bucking bar by weight, and tungsten packs that weight into a far smaller block than steel.
Why is the ETBB11 made of tungsten instead of steel?
Tungsten alloy is about 2.5 times denser than steel, so the ETBB11 delivers the same bucking mass as a steel bar more than twice its size. The compact mass means better access in tight structure and less shock to your hand.
