Grade 4.8 8.8 Oxide Edged Square Wing Round Butterfly Wing Nut DIN314 DIN315
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... must be used according to the different materials, divided into carbon steel, stainless steel, non-ferrous metals (such as copper) and other major types. The nut is a part that closely connects the mechanical equipment....
Hunan Jia Shan Hardware Tech Co., Ltd.
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