frictional fit restricting movement of the screw when it is subjected to vibration

2 1/4-4 1/2 A563 Grade A Heavy Hex Nut Plain

(BD™) 1/2-13 Toggler SNAPTOGGLE® Heavy Duty Toggle Bolt Zinc Plated (25)

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wallboard and other hollow base materials

1/4-20 x 3 1/4 Simpson STB2 Wedge Anchor 304 SS (100) Flat Mushroom Toggle Bolts Zinc Plated frictional fit restricting movement of1 4 20 x 3 1 4 Simpson STB2 Wedge Anchor 304 SS (100) . WEDGE ALL wedge anchors are a non bottom bearing, wedge style expansion anchor for use in solid concrete or grout filled masonry. A one piece clip ensures uniform holding capacity that increases as tension is applied. The threaded stud version is available in eight diameters and multiple lengths. A single size tie wire version is available for wire supported fixtures. Threaded studs are set by