Shanghai Yueguan Hardware Co.,Ltd.

上海跃冠五金有限公司

(GB /T 77 - 2000)

material	Alloy Steel
grade, rigidity	Grade 12.9 (HRC39~44)
Coating	black oxide coating
跃冠五金长期供应GB77内六角平端紧定螺钉材质可提供：合金钢12.9级、不锈钢304等非标尺寸接受定制如有需求，欢迎来电洽谈

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