Products Description

Flanged Hex Head Screws (Flange Hex Bolts) conform to DIN6921 standards. The one-piece forged design integrates hex head and enlarged flange, eliminating extra flat washers; serrated flange teeth further boost anti-loosening effect. Ranging from Grade 4.8 to 12.9 high strength, made of carbon/alloy steel with various anti-corrosion treatments, they feature even pressure distribution, great vibration resistance and heavy load capacity, ideal for automotive, heavy machinery, steel structure, construction and high-vibration industrial fastening.

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Parameter

Standard	DIN6921
Name	Flanged Hex Head Screws
Material	carbon steel and alloy steel, etc.
Grade	Grade 4.8, Grade 5.8, Grade 8.8, Grade 10.9, Grade 12.9
Nominal Diameter	M2-M48
Pitch	0.4-5
Surface treatment	ZP,YZ,BLACK
Alias	Flange hexagon bolts

Strength Grade Application Classification

Grade 4.8 / 5.8: Economical & medium universal grades, for light-medium static load, cabinet assembly, furniture hardware, indoor mechanical non-vibration fastening
Grade 8.8: Standard high-strength grade, balanced toughness and anti-fatigue performance, mainstream choice for general machinery, semi-outdoor equipment, medium-load vibration assembly
Grade 10.9: High-tensile heavy-duty grade, core choice for automotive chassis, engine auxiliary parts, medium-heavy steel structure connection
Grade 12.9: Ultra-high strength top grade, maximum load-bearing and impact resistance, for heavy mining machinery, port equipment, construction load-bearing key structural fastening

Application Scenarios

Automotive Industry

Flanged Hex Head Screws deliver vibration-resistant heavy-load fastening for automobile chassis, suspension brackets, engine peripheral components and motorcycle frame, locking parts tightly against driving vibration.

Heavy Machinery Manufacturing

Flanged Hex Head Screws realize stable high-load dynamic connection for mining equipment, port lifting machinery, agricultural machinery and conveyors under long-duration heavy working loads.

Construction & Steel Structure

Flanged Hex Head Screws complete secure fixing for steel beam-column auxiliary connection, industrial workshop frame, pipeline support hanger and outdoor guardrail with enlarged flange bearing surface.

General Mechanical Equipment

Flanged Hex Head Screws provide reliable anti-loose assembly for pumps, motors, textile machinery and packaging equipment under continuous operation vibration.

Electrical & New Energy

Flanged Hex Head Screws undertake heavy fastening for photovoltaic brackets, energy storage equipment frames and large power distribution cabinet structural fixing with enhanced anti-slip and load-bearing performance.

Why choose us

Why choose us?

Each batch of products undergoes tests on raw material composition, hardness, tensile fracture load, torque fatigue, thread accuracy, and salt spray corrosion, ensuring compliance with DIN industrial safety standards. Customized services are available, including fine thread specifications, serrated/non-serrated flange options, laser brand marking, and special length customization. For detailed size catalog, mechanical performance parameter table, and bulk purchase discount quotations, please contact us.