One key was attached to a huge metal washer, the other to a wooden disc.

Drive 3/4-inch long sheet metal screws with two flat metal washers under each head into each hole.

To distribute pressure, use roundhead screws with flat metal washers beneath the heads.

She introduced a simple flow restrictor: a small metal disc much like a plain metal washer.

With all fasteners, place a flat metal washer beneath the head to distribute pressure against the hardboard.

Buy a flat metal washer approximately twice the diameter of the bolt head to accompany each bolt.

Slide a flat metal washer onto each bolt before inserting it.

To make sure the fluid can pass freely between the disks, metal washers are used as dividers.

If the cover is plywood, use ringed-shank nails with a flat metal washer placed under the head to fasten the insulation to it.

Buy flat metal washers for beneath the bolt heads and label each plywood sheet before removing it.