Danco 40602B Tank Bolt Washer, 1/4 in ID x 1 in OD x 1/8 in H Dimensions, Rubber, For: 5/16 in Bolts (Pack of 5)

These 5/16 in Tank Bolt Washers from Danco install between the china of the toilet tank and the bolts that connect the tank to the bowl. The washers are made of flexible rubber that will endure the rigors of everyday use. They allow for quick and easy installation.