Disc Springs: "S" Type - Light Duty

This range of safety washers has the unique feature of radial serrations on both of the concave and convex surfaces. When final flattening of the safety washer occurs with tightening of the screw, these serrations bite into the mating faces, therefore preventing loosening of the screw because of vibration etc. Furthermore, the disc spring profile will assist in retaining the required screw tension. In comparison to a conventional disc spring, or Belleville spring washer, the safety washer provides a reduced outside diameter. This corresponds to most screw head sizes, and is especially compatible with the hexagonal socket type screw.