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Shanghai Yongyi Fasteners Co., Ltd.
上海永矣紧固件有限公司
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8 Years
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Pins
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Combined screws
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Non-standard fasteners
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(GB 798 - 1988)
material
Carbon steel
grade, rigidity
grade 8.8
Coating
black oxide coating
规格M5-M30
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GB /T 798 - 2021
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