Standard
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GB, DIN, ISO, ANSI/ASTM, BS, BSW, JIS etc
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Size
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M4-M24 or non-standard as request&design
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Material
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Carbon steel, stainless steel, alloys steel etc.
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Grade
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a2,a4,4.8,8.8,10.9,12.9.etc
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Packing
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Box, carton or plastic bags, then put on pallets, or
according to the demand of the customers
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