The ETBB18 is a hook tungsten bucking bar for reaching around a rib or flange to back rivets a flat bar cannot reach behind. At 3.75 x 1.5 x 1.375 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.
An L profile with a flat foot and a raised vertical wall seats tungsten mass on the rivet tail while the heel clears the obstruction. At roughly 2.5 times the density of steel it delivers heavy backing from a slim tool.
- Dimensions: 3.75 x 1.5 x 1.375 in
- Weight: 2.52 lb
- Shape: Hook
- Best-fit access: ribs, flanges, and boxed structure
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Questions about this bar
What is the ETBB18 tungsten bucking bar used for?
The ETBB18 is a hook tungsten bucking bar for reaching around edges and flanges to back a rivet a straight bar cannot, hooking the mass in behind the joint. Hold it flat and square against the rivet tail so the shop head forms evenly.
What size is the ETBB18 bucking bar?
The ETBB18 measures 3.75 by 1.5 by 1.375 inches. It weighs 2.52 lb. Standard lead time is 10-12 weeks.
Why is the ETBB18 made of tungsten instead of steel?
Tungsten alloy is about 2.5 times denser than steel, so the ETBB18 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.
