Screw washers are used to distribute the load of a threaded fastener, prevent surface damage to the connected parts, and stop the screw or bolt from loosening under vibration.

Lock washers feature unique designs, such as split rings or external teeth, that bite into the bearing surface and fastener head to create tension and resist loosening caused by vibration or thermal expansion.

Nylon washers are lightweight, corrosion-resistant, and provide excellent electrical insulation. They also offer a good seal, minimize wear on mating parts, and absorb shock and vibration.

Square washers are ideal for structural construction, heavy-duty machinery, and wood-to-metal joints. Their larger surface area distributes loads more widely and prevents the washer from sinking into soft materials like wood.

Washers are commonly manufactured from carbon steel, stainless steel, brass, copper, and various non-metallic materials like nylon, rubber, and Teflon depending on the application environment.