AW-BS28 Butterfly bolts/forged wing bolts/to drawing bolts

Steel butterfly bolts, Special wing bolts, Customized bolts

Material: Carbon Steel, Steel class 4.6/4.8/5.6/6.8/8.8/9.8/10.9/12.9

Size: M6, M8, M10, M12

​​Surface treatment: Zinc plated Cr3+blue,yellow,green, Plain, Blk ,Hot-dipped galvanized

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