Used widely in the home and office appliance, communication equipment and other machinery industry. Used to fit bolts, studs or machine screws for fastening two parts together to make them one piece. Our team pay heavy attention on their product quality and service. To enjoy the service, check this item you bought are directly from our team will be highly recommended. Essential accessories for maintenance and easy to use and install. These nuts are made of carbon steel with zinc plated, better strength and not easy to rust.