Features:

• Made of black oxidized carbon steel, which has the characteristics of good cutting performance, high hardness, good toughness and wear resistance after quenching and tempering treatment.
• The flat washer is commonly used to distribute loads of threaded bolts, screws, and nuts evenly as the fastener is tightened.
• Intended for general use under the head of a bolt or nut across the area of the support in order to provide a smooth surface and prevent pull through.
• Widely used in mechanical industry, automotive, home decoration, electrical maintenance, furniture repair, shop and outdoor construction, and threaded bolt connections.