We are chinese and have manufactured fasteners including screws bolts nuts and washers for several years.And we would like to help you to produce best goods who can meet your request for you. We are well known in china , and we hold enough experience to control the quality ,because many of us graduated from mechanical college and worked in the factories for several years. Pls email to me to tell us what you want in details in your convenience.and we will give you our best price and best delivery arrangement. Our competitive products: DIN 931 933 6914 6915 ISO 7914 7912 ANSI A325 A449