M4.5 Flat Penny Washers (Pack of 25) Round Metal Steel Washers for Screws, Nickel Coated Plated Galvanized Heavy Duty Certified (10x4.9x1.0mm) - Made in Germany

• HIGH-QUALITY GERMAN STEEL: Our German steel is superior to regular steel and the Nickel-Plating means that they are the highest form of corrosion-resistant steel and have great anti-corrosion properties, making it last longer than other hardware on the market today.
• MADE IN GERMANY: Our washers are precisely produced using the highest quality raw materials and latest machinery to the highest standard and are very strong making them suitable for a wide variety of applications.
• MADE TO LAST: Our German Steel washers are of the highest quality available on the market and far superior to others on the market in terms of quality and strength.
• MANY USES: Flat washers that can be used on a wide variety of applications at home or in commercial and industrial manufacturing, maintenance & repairs for materials such as wood, metal, resin, plastic to prevent pull-through offering a flat bearing surface that distributes the weight ensuring a secure hold.
• DIMENSIONS: For Inside diameter, outside diameter and thickness please refer to the second picture for each size for dimensions.

The main role of flat washers is to increase the size of a screw’s bearing surface area and reduce the surface pressure applied on the fastened object. Looseness can result when the bearing surface sinks under the surface pressure, so using a flat washer to reduce the surface pressure is very effective. This is especially crucial if the contact area between a screw’s bearing surface and the object being fastened is small when fastening to a slot, for instance, or if the object being fastened is made of soft material such as wood, aluminium or resin.