China titanium piping solution supplier: www.titaniuminfogroup.com

Titanium information group | Titanium pipe, titanium fitting, titanium valve, titanium flange manufacturer – www.titaniuminfogroup.com

Bolts use a wide variety of head designs, as do screws. These are designed to engage with the tool used to tighten them. Some bolt heads instead lock the bolt in place, so that it does not move and a tool is only needed for the nut end.

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