website:https://www.jhmindustry.com/
Shanghai Jian & Mei Industry and Trade Co., Ltd. is the company which manufacture and export fasteners and metal hardware, founded in 2006, with import-export authority. Now, 80% products export to all over the world and 20% sell in domestic market.
This video explain Finding a Wrench for US Standard and Metric-Sized Bolts.
1)Relationship between size of nut and it’s wrench.
2)How to Determine the Wrench Size for a Given Bolt and Nut Size
3)Wrench size calculation
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