RS PRO Copper Sealing Washers, M4

RS PRO range of hard rolled metric copper washers in sizes M3 to M12. This RS PRO range of copper washers are generally used with a machine threaded fastener and nut to spread the load over a greater surface area when tightening a bolt, screw or nut. These washers help prevent wear and distortion of installation surfaces over time whilst reducing heat and friction during the tightening process.
Options include the following sizes:
293-167 - M3
293-173 - M4
293-189 - M5
293-195 - M6
293-202 - M8
293-218 - M10
293-224 - M12
RS PRO aims to be your go-to brand for reliability and value for money. We source great parts at great prices and test everything with our in-house experts to ensure the quality you need. When it comes to tools and fasteners, we know that versatility and dependability are what you need. As such, we stock a variety of mainstay and specialist fasteners and couplers to suit any application. Whether you're a professional electrician, plumber, builder or DIY enthusiast, RS PRO is here to support you.

Plain washers in various sizes - M3, M4, M5, M6, M10 and M12
Internal diameters from 3.0 mm to 12.5 mm
Outer diameters from 6.7 mm to 15.9 mm

RS PRO washers are an essential part of any fastener assembly. They decrease the surface load when joining materials, meaning there is less pressure on the material, resulting in a decrease chance of wear and tear over time. You can use them to make maintenance easier by allowing for smoother loosening and tightening of components. Plain washers are commonly used in many electronic, food, chemical and construction applications.

FAQs
How Do Washers Work?
RS PRO washers are important for any fastener assembly, as they serve to incorporate spacing and distribute load when placed between a nut and bolts. These washers will help prevent wear and distortion of installation surfaces over time.
What Types Of Washer Are Available?
Plain or Flat washers are available in different materials, finishes and thicknesses from 0.3 mm to 5 mm. Washers are also available with various inside and outside diameters. Depending on application and environment, there are specific attributes that must be considered when selecting the correct washer. For example, stainless steel offers good corrosion resistance making it suitable for outdoor applications. Other materials include brass, ceramic, steel, stainless steel.

Why RS PRO?
RS PRO is our own brand range and brings you a wide range of high-quality, great value products offering you more choice. Trusted by engineers all over the world, every part of every RS PRO product has been rigorously tested against demanding industry standards; they’re only given the RS PRO seal of approval if we’re confident of their exceptional quality, which means you can be confident too.