Shanghai Yueguan Hardware Co.,Ltd.

上海跃冠五金有限公司

(DIN 914 - 1980)

material	Alloy Steel
grade, rigidity	grade 12.9
Coating	black oxide coating
跃冠五金长期供应DIN914内六角尖端紧定螺钉，材质合金钢12.9级、不锈钢304等

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