The ETBB40 is a contoured saddle tungsten bucking bar for backing rivets along a curved skin, tube, or bead that a flat bar cannot follow. At 3.75 x 1.875 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 concave scalloped channel between two angled walls cradles the work so the bar seats flush along the contour while dense tungsten backs the rivet tail. At roughly 2.5 times the density of steel it holds firm for clean shop heads without marring the surface.
- Dimensions: 3.75 x 1.875 x 1 in
- Weight: 3.05 lb
- Shape: Low-Profile
- Best-fit access: curved skins, tubes, and beads
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Questions about this bar
What is the ETBB40 tungsten bucking bar used for?
The ETBB40 is a heavy tungsten bucking bar for larger rivets and thick structure, delivering maximum backing mass in a hand-held bar. Hold it flat and square against the rivet tail so the shop head forms evenly.
What size is the ETBB40 bucking bar?
The ETBB40 measures 3.75 by 1.875 by 1 inches. It weighs 3.05 lb. Standard lead time is 10-12 weeks.
Why is the ETBB40 made of tungsten instead of steel?
Tungsten alloy is about 2.5 times denser than steel, so the ETBB40 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.
