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Haiyan Chenwang Fastener Co., Ltd.
海盐晨旺紧固件有限公司
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7 Years
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Flange nuts
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(GB /T 6172.1 - 2000)
material
Carbon steel
grade, rigidity
grade 4.8
Coating
electroplating
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GB /T 6172.1 - 2016
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