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https://www.jnzcsb.com/products/hexagon-socket-head-cap-bolts.html

The outer edge of the head of the china hexagon socket bolt is round, and the iddle is a recessed hexagon.

High-strength hex socket button head bolts have the advantages of being countersunk, easy to fasten and disassemble, not easy to slip, fatigue-resistant, and not loose under dynamic loads.

Hex socket cap head are widely used in construction, mechanical equipment, electrical, electric power, chemical industry, water conservancy, railway, aerospace, and other fields.
           
Specification of Hexagon Socket-head Cap Bolts
Thread specification range (mm)M16-M90
Maximum processing length (mm)≤1500mm
Strength Range≤1450MPa
Geometric ToleranceThe verticality of the supporting surface relative to the thread is ≤0.02mm
Friction Coefficientμtot, μb, μth
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.

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