Washers are a thin ring of material with a hole in the centre. They are an essential part of any fastener assembly and are used in conjunction with screws, nuts and bolts. Washers provide a range of benefits, such as preventing wear, reducing pressure, reducing vibration or to prevent the screw from loosening. Types of Washer The M20 x 44mm Heavy Duty Flat Washers (DIN 7349) - Stainless Steel (A2) has the following features: Metric Flat Washers, part of Accu's Stainless Steel Washer & Spacers range, are designed primarily to enhance the load-bearing capabilities of a threaded fastener. These components are compatible with a wide range of Precision Screws . Flat Washers are versatile components with a variety of uses, including spacing, pre-load indication, and wear-protection. All Stainless Steel Washers are resistant to tarnishing and corrosion, but A4 (316) Stainless Steel is specifically designed for use in marine environments. Flat Washers can also be manufactured from a variety of specialist materials, including Aluminium, Brass, Phosphor Bronze, Nylon, PEEK, Polycetal, Reny, Polyphenylene, Polycarbonate and Titanium. Fibre and Rubber Flat Washers are intended to be pliable for sealing purposes. Metric Flat Washer Sizes

Where a flat surface is not required, components such as Countersunk Washers or Spring Washers may be preferable. Materials The M20 x 60mm Large Series 200HV Flat Washers (ISO 7093-1) - Marine Stainless Steel (A4) has the following features: Shape- The majority of washers are round to match the round head of a screw of bolt. You can also buy square washers for use with bolts with a square head.

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BS4320 washer forms A to D are typically supplied self-finish in a range of metals including steel alloys, brass and copper. It is important that your washer is compatible with your fasteners and your chosen application. You should consider the following information when choosing a washer. Size-It is important to ensure that your washer is compatible with other fasteners you are using. The screw or bolt is usually measured in metric dimensions, such as M10 (10mm) or M8 (8mm).