Countersunk Washers

Definition:
Countersunk washers are available in three styles to fit most applications. Countersunk washers serve the same function as a flat washer, but they provide a bearing surface for flat head screws. An additional application is providing a sealing function for flat head screws.

Countersunk Washers are available in the following materials and finishes:

• Aluminum: Anodize, Cadmium types I & II, Degreasing, Bright Nickel, Pickling, Silver, Bright Tin, Hot Tin Dip, Zinc types I & II
• Brass: Black Oxide, Cadmium types I & II, Chrome, Degreasing, Bright Nickel, Pickling, Silver, Bright Tin, Hot Tin Dip, and Zinc types I & II
• Cold Rolled Steel (Steel): Black Oxide, Cadmium types I & II, Chrome, Degreasing, Bright Nickel, Pickling, Phosphate, Silver, Bright Tin, Hot Tin Dip, and Zinc types I & II
• Copper: Black Oxide, Cadmium types I & II, Chrome, Degreasing, Bright Nickel, Pickling, Silver, Bright Tin, Hot Tin Dip, and Zinc types I & II
• Phosphorous Bronze: Cadmium types I & II, Chrome, Degreasing, Bright Nickel, Pickling, Silver, Bright Tin, Hot Tin Dip, and Zinc types I & II
• Stainless Steel 301-304: Black Oxide, Cadmium types I & II, Chrome, Degreasing, Bright Nickel, Passivate, Pickling, Silver, Bright Tin, Hot Tin Dip, and Zinc types I & II

Example: Countersunk Washers

This type prevents a screw from scoring soft material.

Hole is countersunk. Countersunk washer and screw are flush with chassis and prevents screw from scoring soft material.

This type eliminates countersinking a hole.