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https://www.jnzcsb.com/products/hexagon-nuts.html

Hexagon shaped nut are hexagonal and internally threaded. It is used in conjunction with bolts, studs, and screws to connect and fasten parts.
                                                       
Hex nut china are suitable for high and medium-pressure valves; marine, marine, chemical, and fluid engineering; pressure vessels; petrochemical equipment, and other fields.                                                                                                                       
All items are produced in strict accordance with industry standards or client-specific requirements. 

Specification of Hexagon Nuts
Processing Diameter Range (mm)M16-M360
Thread Accuracy4H/3B
Geometric ToleranceThe verticality of the supporting surface relative to the thread is ≤0.02mm
Surface TreatmentBlack oxide, Phosphating, Flake zinc-aluminum coating (Dacromet, Geomet), HDG (Hot dip galvanizing), Electro galvanizing, Mechanical galvanizing, Copper plating, Teflon, Special coating for marine engine parts, etc.
Standard Specifications​All items are produced in strict accordance with industry standards or client-specific requirements.

If you are looking for a reliable hex lock nut manufacturer, don't hesitate to contact us! For hex nut cost or buy custom fastener, contact us.