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Aluminum keyhole washers allow for additional security when attaching storm panels with wingnuts
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Comes in bags of 25, 50 or 100 Keyhole Washers. These aluminum keyhole washers are used with our 1/4-20 washered wingnuts when mounting Bertha storm panels. The keyhole slot lets you hang the washer on the bolt first, then tighten the wingnut down over it - no juggling loose hardware overhead on a ladder.
