Scheibe – Washer

A washer is a thin fastening component that serves as a spacer between the head of a bolt (screw) or a nut and the part being fastened.

They are used in the assembly of structures and equipment.

Washers are made from a variety of materials: carbon steel with anti-corrosion coating, stainless steel, non-ferrous alloys, polymers, rubber. By design, washers are divided into flat, spherical, conical (Belleville), square bevel, spring lock, toothed, and multi-tab types.

Purpose of washers:

• increasing the contact area and evenly distributing the pressure on the surface that occurs when tightening a bolt;
• preventing damage to the surface of the part;
• preventing the fastening system from loosening under mechanical vibration.

Rondelle

A washer is a fastening component with a round central hole that is placed under the head of a bolt (screw) and a nut. The spacer increases the contact area between the head and the base: this prevents damage to the fastened part and reduces the pressure on the surface. The connection becomes tighter, reducing the risk of self-loosening. Fields of application include machine building, construction, and road repair and maintenance.

Washers are made of metals, plastic, and rubber. They are classified by purpose, design features, dimensions, and installation specifics. The most popular types are:

• flat;
• enlarged and reduced;
• spring lock;
• double-coil;
• roofing;
• bevel;
• lock;
• tab;
• square.