Strength Grade
Grade 8.8: Entry high-strength grade, suitable for compact family cars, small passenger vehicles, urban light-load daily driving
Grade 10.9: Mainstream universal high-strength grade, balance of load capacity and fatigue resistance, most widely used for sedan, SUV, MPV mainstream passenger vehicles
Grade 12.9: Ultra-high strength top grade, maximum impact and load resistance, for heavy pickup trucks, light commercial vehicles, off-road vehicles, engineering vehicles and heavy-load modified vehicles
Parameter
| Executive Standard | DIN74361 |
| Official Name | Stud Bolt For Wheel |
| Alias | Wheel bolts, Tire bolts, Wheel Hub Studs |
| Raw Material | Carbon steel, alloy steel |
| Strength Grades | Grade 8.8, Grade 10.9, Grade 12.9 |
| Nominal Diameter & Pitch | M12×1.5, M14×1.5, M16×1.5, M18×1.5 (fine pitch thread standard) |
| Surface Treatment | ZP (Zinc Plated), BLACK (Black Oxide / Phosphated Black Finish) |
| Core Structure | Press-fit positioning shoulder + hub mounting thread + rim locking external thread |
Structural Working Principle
- The press-fit shoulder section is interference pressed into the wheel hub to achieve permanent fixed positioning, no rotation or displacement during vehicle operation;
- The inner thread section locks with hub body for embedded anchoring;
- The outer fine thread penetrates wheel rim, matched with wheel nut to clamp rim, brake disc and hub integrally;
- Fine pitch thread improves self-locking performance, resisting loosening caused by high-speed rotation, vibration and braking impact, guaranteeing driving safety.
Targeted Surface Anti-Corrosion Protection
ZP Zinc Plating
Dense zinc coating resists road splash, rainwater, mud and road salt corrosion, ideal for conventional passenger vehicle wheel anti-rust
Black Oxide (Black Finish)
Matte high-hardness anti-oxidation finish, enhances friction during nut tightening, wear-resistant for heavy commercial vehicle hub assembly, resistant to high-temperature brake heat oxidation
Certificate
About us
About our company
Hebei Sanwei Fasteners Co., Ltd. is a high-tech enterprise specializing in the research, development, production, and sales of fasteners, headquartered in Hebei Province, China. Our primary products include various bolts, nuts, flat washers, spring washers, and threaded rods. These products are widely used across multiple industries such as construction, machinery manufacturing, automotive, and power/telecommunications. Customization is available. Click the button below to contact us for more product information and pricing.
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