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    Aluminum Back-Up Washer 3/16-Inch Rivet Diameter

    Part #: BRBUW-6A

    Aluminum round back-up washer sized for 3/16-inch rivet holes, with a ½-inch outside diameter and approx .056-.062-inch thickness, used to spread load and prevent pull-through in soft or thin materials or when hole sizes are slightly oversized. Supplied in packs of 500, this washer ensures more reliable riveted joints in assemblies using aluminum, steel, or mixed substrates.