Types of Washers/gasket

According to washers utility and functions, there are types as below,

1. Spring washer
   1. Belleville or conical washer
   2. Dome spring washer
   3. Wave spring washer
   4. Finger spring washer
   5. Crescent spring washer
2. Lock washer
   1. Split lock washer
   2. External tooth lock washer
   3. Internal tooth lock washer
3. Plain washer
   1. Torque washer
   2. Flat washer
   3. Fender washer
   4. Finishing or Countersunk washer
   5. Shoulder washer
   6. C-washer