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Red Head Dynabolt Hex Nut 5/16 X 1-1/2-Inch Inch Sleeve Anchor feature a split expansion sleeve over a threaded stud bolt body and integral expander, nut and washer. The anchor diameter equals hole diameter, with 1/4 - 3/4 inch diameter anchors available, up to 6-1/4 inch length. The sleeve design improves holding power. These sleeve anchors provides full 360 degree hole contact over large area and reduces concrete stress, with a heavy-loading capacity. They are preassembled for faster, easier installations and can be installed through object to be fastened. No pre-spotting of holes necessary. The anchors are zinc plated and should be installed with carbide tipped hammer drill bits. Available in hex head and six other head styles. Specs: Anchor Diameter and Drill Bit Size - 5/16 inch; Effective Anchor Length - 1-1/2-Inch inch; Bolt Diameter - 1/4 inch; Threads per Inch - 20; Min. Embedment - 1-1/4 inch; Max. Thickness of Material to be Fastened - 1/4 inch.
Steven B.
Reviewed in the United States on November 24, 2021
The product came as advertised and was very strong, but the bolts are only long enough for 1/4 inch of material being fastened. I guess it's designed for the entire top to go through the material, not just the bolt.
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