Uxcell M20 Rubber Flat Washer, 40 Pack 20mm ID 30mm OD 2.5mm Thick Sealing Spacer Gasket Ring, Black

Rubber flat washers are widely used in home installations, and household appliances which with bolted connections. It can also be used as a sealing ring for faucet pipes, hose nuts or garden watering tool accessories.

Advantage
Made of flexible rubber features high temperature, wear-resistant and corrosion-resistant, strong sealing, and insulation. Rubber allows for more effective sealing of harder materials or irregular surfaces.
Rubber washers can be used for sealing applications, i.e. in water, oil, air, etc. They can also be used for cushioning, reducing pressure and friction, increasing the contact area and providing a support surface for fasteners.
When screwing a nut onto a nylon or glass item, it is recommended to use a rubber spacer as a cushion in order to prevent its surface from tearing.

Instruction
Place the washer between the item to be fixed and the bolt, and tighten the bolt.

NOTE:
Please choose an appropriate diameter so as not to affect its sealing performance.