6.3 - 1.81 x 20mm 10mm Indented Hex Washer Head 17mm O.D. Loose Washer Black Phosphate Finish Sheet Metal Screws Compare with: Auveco #12351, G.M. # 11505022, Car Pak # 99-8406, 998406, W&E # 2423, Crest / Midwest # CRX10768, Disco # 5950PK, 5950B, Kent / Lawson # P51801, Winzer # 275.209, S&R # 216195