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5734 12.9 grade screws products are offered for sale by suppliers on Alibaba.com, of which bolts accounts for 47%, screws accounts for 38%. A wide variety of 12.9 grade screws options are available to you, such as black oxide, silver plated and chrome plated.You can also choose from stainless steel, carbon steel and ss304 12.9 grade screws,As well as from zinc plated, plain 12.9 grade screws, and whether 12.9 grade screws is iso, gb, or ansi.