Self-Locking Washers

Self-Locking Washers are used in conjunction with weld pins, insulation anchors and lacing anchors to fasten insulation in place.
Self Locking Washers Round thumbnail
Self Locking Washers Square Beveled thumbnail
Self Locking Washers Rectangular Beveled thumbnail


Sound Acoustic Solutions stocks self-locking washer that is manufactured primarily of Mild Steel, with Standard Stainless and Aluminum sizes available. We offer self-locking washers in various shapes and sizes; square or round. These insulation washers mount on many types of insulation fasteners for holding insulation material in place. The gauge of the pin, or diameter, should match the fastener it is being affixed.


Self-Locking Washers Round:

  • Diameter: 1 inch, 1-3/16 inches or 1½ inches
  • Material: Mild Steel or Stainless Steel
  • Plating: Galvanized
  • Edge: Beveled

Self-Locking Washers Square – Beveled:

  • Diameter: 1.5 inches or 2.5 inches
  • Material: Mild Steel
  • Plating: Galvanized
  • Edge: Beveled

Self-Locking Washers Rectangle – Beveled:

  • Diameter: 1-1/8 inch x 1-1/4 inch
  • Material: Mild Steel
  • Plating: Galvanized
  • Edge” Beveled

Weight N/A

Dimensions N/A

Shape: Round, Square, Rectangular

Type: Mild Steel, Stainless Steel

Diameter: 1 inch, 1-3/16 inch, 1½ inch, 1 inch x 1¼ inch, 2½ inches

Quantity: Bag of 200, Bag of 1000