Ruwag Cup Washer 3.5mm (10) is a small but essential component used in automotive assembly and repairs, particularly where a secure, stable connection is required between fasteners. This new part comes in a pack of 10, making it suitable for multiple applications or replacements. The washer’s 3.5mm size denotes its internal diameter, which should be carefully compared against your existing washers to ensure compatibility with bolts or screws in use.
Cup washers, like this Ruwag unit, are typically employed to distribute pressure evenly and prevent damage to surfaces during tightening. They also help maintain the integrity of the fastening by reducing the risk of loosening due to vibration. When considering this part for purchase, verify that the dimensions and type align with your vehicle or machinery’s requirements, as cup washers vary greatly in size and shape depending on application.
This listing provides a reliable option for anyone needing a matched set of cup washers for repair or maintenance projects. If unsure about matching or fitment, consulting with a sales advisor or submitting a detailed request can help secure the right product. The included quantity of ten allows you to replace multiple washers or keep spares on hand.
Need help matching this item to your vehicle? Use Vehicle Parts Finder, Request a Part or Platinum Sales Desk with your VIN, engine number, part number or clear photos.

