The ETBB04 is a straight tungsten bucking bar for backing solid rivets on flat skin and open structure. At 1.35 lb and 2 by 1.5 by 0.75 inches it packs the bucking mass of a much larger steel bar into a compact block, so shop heads form clean with less shock to your hand.
Its square, parallel faces sit flat against the work so the bucktail forms a clean shop head, and at roughly 2.5 times the density of steel the bar delivers heavy backing mass in a block small enough to hold all day. Builders reach for a straight bar like this on wing and fuselage skins, ribs, and the long rivet lines that make up most of a build. The compact mass means less bounce, fewer marred heads, and noticeably less hand and wrist fatigue over a long session.
- Dimensions: 2 x 1.5 x 0.75 in
- Weight: 1.35 lb (light)
- Shape: Straight
- Best-fit access: tight corners and confined access
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Questions about this bar
What is the ETBB04 tungsten bucking bar used for?
The ETBB04 is a straight tungsten bucking bar for backing solid rivets on flat skin and open structure, where its square parallel faces sit flat against the work. Hold it flat and square against the rivet tail so the shop head forms evenly.
How much does the ETBB04 bucking bar weigh and what size is it?
The ETBB04 weighs 1.35 lb and measures 2 by 1.5 by 0.75 inches. You buy a bucking bar by weight, and tungsten packs that weight into a far smaller block than steel.
Why is the ETBB04 made of tungsten instead of steel?
Tungsten alloy is about 2.5 times denser than steel, so the ETBB04 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.
What is the closest ATS equivalent to the ETBB04?
The ETBB04 cross-references to ATS6006 by published size and shape. See the cross-reference page to confirm dimensions before ordering.
