BBI 448010 SAE Tension Flat Washer, 1/2 in, 0.526 - 0.536 in ID x 1.055 - 1.092 in OD, 0.09 - 0.112 in THK
BBI Tension Flat Washer, SAE, Series: IMPERIAL L9??, 1/2 in Nominal Size, 0.526 - 0.536 in Inside Dia, 1.055 - 1.092 in Outside Dia, 0.09 - 0.112 in Thickness, 15N 82-85 Hardness, Carbon Steel, Zinc Yellow