Fender washers are handy for spreading the load of a fastener over a larger area. They're often used in automotive repairs, furniture assembly, and DIY projects where you want to prevent damage to surfaces or materials. Their wide diameter helps secure thin or soft materials, like sheet metal or wood, without causing them to bend or break. If you're working on a project that needs extra support around a bolt or screw, fender washers can help provide stability and reduce the risk of pull-through.

The name "fender washer" comes from their original use in automotive fender repairs. These washers were designed to help secure car fenders, which are typically made of thin sheet metal. Their large diameter made them ideal for distributing pressure and preventing damage to the fender. Over time, the term stuck, and now fender washers are used in a variety of applications beyond cars, wherever extra surface area is needed for fastening.

• Standard washers are usually smaller in diameter and mainly serve to protect surfaces and distribute force around a bolt or screw.
• Fender washers have a much larger outer diameter compared to the hole size, which allows them to cover more area and provide extra support. They're ideal for securing thin or soft materials that might otherwise be damaged by a fastener.

Choosing between the two depends on your project needs and the materials you're working with.

Fender washers are sometimes referred to as large OD (outer diameter) washers or repair washers. These names highlight their main feature: a bigger surface area compared to standard washers. While "fender washer" is the common term, you might see other names in hardware stores or product listings, especially when looking for washers designed for specific repair or support tasks.

1. Check your bolt or screw size: The washer's inner diameter should match the fastener.
2. Consider the material: If you're fastening thin or soft materials, a larger outer diameter helps spread the load.
3. Look at thickness: Thicker washers can offer more durability for heavy-duty jobs.

It's a good idea to review your project requirements and match the washer size to both your fastener and the material you're working with. Assortment kits can be helpful if you're unsure which size you'll need.