Washer (5/Pack) - Quicksilver - 20684 (20684-PK) is a thin plate with a hole (usually in the middle) that spreads the load of a threaded fastener such as a bolt or nut. Other applications include spacers, springs (Belleville washers, wave washers), wear pads, pre-load indicators, locking devices, and vibration reduction (rubber washers). These washers are hardened steel washers, which is better used in high-quality bolted joints to prevent pre-load loss due to brinelling after torque is applied. Washers also protect steel screws from galvanic corrosion by insulating them from aluminum surfaces. Key Features: Spread a load to avoid harm to the surface, or use some insulation, such as electrical tape. When deformed, it produces an axial force. The surface may be serrated, which will strengthen the locking capabilities. It gives the most vibrational loosening prevention possible. Product Details: SKU: 20684-PK UPC: 745061130104 Weight: 0.04 LBS Diagram Reference Number: 45 Unit Lenght: 4.5 IN Unit Width: 3 IN Unit Height: .4 IN Metric Unit Length: 11.429 CM Metric Unit Width: 7.619 CM Metric Unit Height: 1.016 CM Part Name: WASHER @5 Part Class: 0012 Status: ACT Pack QTY: 5 Pack Weight: .002 LBS Metric Unit Weight: .001 KG UPC: 745061130104 Unit Lenght: 4.5 IN Unit Width: 3 IN Unit Height: .4 IN Metric Unit Length: 11.429 CM Metric Unit Width: 7.619 CM Metric Unit Height: 1.016 CM Country of Origin: US Hazardous Code: 0