Expansion Shields

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Expansion shields may be single- or double-piece design. Both are inserted for shear loads or where the bolt may be under side pressure or vibration. Expansion shields consist of a nut, a cone, and a tubular shield that are put together as a single unit. The two-piece tubular shield in either version contains a wedge-shaped nut at one end, a wedge-shaped hollow cone at the other end, and is held in place by two spring bands. The expansion at both ends of the shield spreads the anchored load throughout its length.