class 8.8 galvanized hex bolt , Iran

Grade 8.8 hex bolts are among the most widely used high strength fasteners in machinery, construction, automotive, heavy equipment, and structural steel applications. Manufactured from medium carbon or alloy steel and heat treated through quenching and tempering, these bolts provide an excellent balance of strength, toughness, and durability. The 8.8 property class indicates a minimum tensile strength of 800 MPa and a minimum yield strength of 640 MPa, making them suitable for both static and dynamic loading conditions. Produced in accordance with international standards such as DIN 931, DIN 933, ISO 4014, and ISO 4017, Grade 8.8 hex bolts are commonly available in sizes ranging from M6 to M36 with finishes including zinc plated, hot dip galvanized, black oxide, and zinc flake coatings to improve corrosion resistance and service life.

Thanks to their excellent strength to cost ratio, Grade 8.8 hex bolts are the preferred choice for assembling gearboxes, electric motors, pumps, cranes, mining equipment, agricultural machinery, conveyors, steel structures, and general industrial equipment. Their reliable mechanical properties allow them to withstand high clamping forces while maintaining joint integrity under continuous vibration and cyclic loading. For optimum performance, they should be installed with compatible Grade 8 nuts and hardened washers using the specified tightening torque and preload. Proper selection of bolt diameter, length, thread pitch, and protective coating significantly enhances connection reliability, reduces maintenance costs, and extends the operational life of industrial equipment operating in demanding environments.You can order and buy class 8.8 galvanized hex bolt from Iran by contacting us through whatsaap and email.
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