Shanghai Yueguan Hardware Co.,Ltd.

上海跃冠五金有限公司

(DIN 913 - 1980)

material	Alloy Steel
grade, rigidity	grade 12.9
Coating	black oxide coating
跃冠五金长期供应DIN913内六角平端紧定螺钉，合金钢12.9级、不锈钢304等

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