DOP532193003 Husqvarna Bolt and Washer Assembly No. 532193003. Blade Bolt, Washer Assembly No. 193003. This is an original AYP part. This is the bolt and washer that holds the blade to the spindle. 7/16 x 20 Thread. Replace Husqvarna part numbers 532-19-30-03. 193003, and 532193003.