Ruwag Square Flat Washer 13x36mm (100) is a set of flat washers designed for use in various automotive and mechanical assemblies where a square flat washer of this size is required. These washers help distribute the load of a threaded fastener, such as a bolt or nut, reducing wear and preventing damage to the surface being fastened.
This listing covers 100 washers each measuring 13mm inner diameter by 36mm outer diameter, identified by the SKU BB-405240. They are new parts suitable for situations needing square flat washers matching these exact dimensions. When replacing washers, it is important to compare the size and shape to your original components to ensure proper fit and function.
The flat washer’s square shape may offer better anti-rotation characteristics in some assemblies compared to round washers. This part is typically used in fastening points where stability and load distribution are critical. If you require a different size or shape, consider submitting a Request a Part to find a closer match.
- Set quantity: 100 units
- Washer size: 13x36mm
- Square flat washer style
- Condition: New
Check the washer dimensions carefully against your older parts to confirm compatibility before purchasing, and contact the Sales Desk for assistance if unsure about fitment or alternatives.
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.

