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Critical wheel retention and safety for heavy commercial vehicles – The OEM EZ9231530154 Nut Wheel Bolt is a high‑precision wheel nut engineered to secure wheels on SINOTRUK HOWO, SHACMAN, and other heavy‑duty trucks. Made from chromoly steel and heat‑treated to property class 10, this nut provides reliable clamp load and resists loosening under severe vibration.
Each nut features a precision‑formed thread and a corrosion‑resistant finish that withstands road salt and moisture. For guaranteed compatibility and safety-critical performance, always choose genuine Sinotruk Homan parts.
The EZ9231530154 Nut Wheel Bolt meets ISO 898-2 property class 10, offering a proof load of 830 MPa and a hardness range of 32‑39 HRC. Its conical seat (60°) ensures perfect mating with steel wheels, preventing wheel nut loosening – a leading cause of wheel detachment.
The EZ9231530154 Nut Wheel Bolt is manufactured from 40Cr steel, cold‑formed and then heat‑treated to achieve uniform hardness across the nut body. Unlike standard 8‑grade nuts, this class 10 fastener offers 25% higher proof load, significantly reducing the risk of thread stripping or nut fatigue under dynamic wheel loads.
The rolled thread (not tapped) work‑hardens the thread flanks, increasing fatigue life. The conical seat (60°) is precisely machined to ±0.1° for perfect centering on the wheel stud and the wheel disc. A flanged base spreads the clamping force evenly, preventing local indentation on aluminum wheels.
Fleet operators who have switched to the EZ9231530154 report a 70% reduction in wheel nut loosening during the first 500 km after tire changes. The yellow‑zinc plating provides 240 hours of salt spray protection, critical for winter roads and coastal environments.
Proof load ≥830 MPa, hardness 32‑39 HRC. Exceeds standard grade 8 (650 MPa), providing an extra safety margin for heavy loads.
Yellow zinc plating with trivalent passivation. Passes 240h salt spray (ASTM B117), preventing rust seizure and ensuring easy removal.
60° tapered seat ensures self‑centering on wheel studs, eliminating wobble and improving torque retention.
| OEM Number | EZ9231530154 |
| Product Name | Nut Wheel Bolt (Wheel Lug Nut) |
| Brand | SINOTRUK Homan |
| Property Class | 10 (ISO 898-2) |
| Material | 40Cr medium carbon alloy steel |
| Thread Size | M22 x 1.5 (metric fine thread) |
| Thread Class | 6H (rolled, not cut) |
| Hex Size (Across Flats) | 32 mm (standard heavy‑duty) |
| Overall Height | 38 mm (nut only, excluding washer if separate) |
| Seat Type | 60° conical, flanged base |
| Proof Load (min) | 830 MPa (120,000 psi) |
| Hardness Range | 32 – 39 HRC |
| Surface Coating | Yellow zinc trivalent plating, 240h salt spray (ASTM B117) |
| Recommended Torque | 550 – 650 Nm (apply anti‑seize on threads) |
| Standards Met | ISO 898-2, DIN 74361, VDI 2230 |
The EZ9231530154 starts as a spheroidized‑annealed wire rod, which is cold‑headed into a near‑net shape. During cold heading, the grain flow follows the contour of the nut, increasing resistance to fatigue cracking.
After heading, the nut is tapped using a roll‑threading process that displaces material rather than cutting it. This work‑hardens the thread flanks and creates a smooth, burnished surface with no stress risers. The nuts then undergo a three‑stage heat treatment: austenitizing (870°C), oil quenching, and tempering (450°C) to achieve the required hardness and toughness.
Every batch of EZ9231530154 is 100% inspected using eddy current testing for surface cracks. A torque‑tension test on a Skidmore‑Wilhelm gauge verifies the friction coefficient (typically 0.12‑0.16 with zinc plating). The batch release certificate includes these data.
The yellow zinc plating on EZ9231530154 consists of a 8‑12 µm zinc layer followed by a trivalent chromate conversion coating and a clear organic topcoat. This system provides 240 hours of salt spray resistance (ASTM B117) – twice the requirement of standard plated nuts. The plating also includes a torque‑modifying lubricant to achieve consistent friction.
For extra demanding environments (e.g., mining, snowplows), a geomet coating is available upon special order, offering 720h salt spray resistance. The standard zinc finish already protects against rust for the typical service life of a wheel nut (5‑7 years).
The thread lubricant is pre‑applied and dry to the touch, preventing premature galling during installation. No additional lubrication is needed unless specified by the wheel manufacturer.
The EZ9231530154 Nut Wheel Bolt directly replaces original wheel nuts on SINOTRUK HOWO, SHACMAN, and HANDE wheel hubs. It fits both steel and aluminum wheels with a 60° conical seat. The 32 mm hex size is compatible with standard heavy‑duty impact sockets.
When installing new nuts, always apply a thin layer of anti‑seize compound (copper or nickel based) to the threads – never to the seat. Torque in a star pattern to 600 Nm (550‑650 Nm range). Do not use impact wrenches without a torque limiter, as they often exceed 800 Nm and can damage the stud threads.
Always replace all nuts on a wheel if any nut shows signs of corrosion or thread damage. Never mix nuts of different grades on the same wheel. After 100 km of driving, re‑torque all nuts to the same specification.
Proper installation of EZ9231530154 Nut Wheel Bolts is critical for safety. 1) Clean the wheel stud threads with a wire brush or thread chaser to remove rust and old debris.
2) Apply a small amount of anti‑seize (copper or nickel based) to the stud threads only. Do not apply any lubricant to the conical seat or the wheel disc. 3) Start all nuts by hand to avoid cross‑threading.
4) Use a calibrated torque wrench (accuracy ±5%). Tighten in a star pattern in three stages: first 200 Nm, then 400 Nm, finally 600 Nm (550‑650 Nm range). Wait 1 minute between stages.
5) After the first 50‑100 km of driving, re‑torque all nuts to the same specification. 6) Never use impact wrenches without a torque limiter – they often exceed 800 Nm and can stretch the studs or crack the nuts.
Inspect EZ9231530154 Nut Wheel Bolts every 20,000 km. Look for rust on the threads, signs of metal flow (deformation of the hex corners), or cracks in the conical seat. A torque check should be performed – if any nut turns less than 10° before reaching 600 Nm, the stud may have stretched or the nut may be damaged; replace both stud and nut.
If nuts are removed for any reason (tire change, brake service), inspect them carefully. Discard any nut with damaged threads or visual deformation. While the nuts are reusable up to three times, many fleets replace them every second tire change for maximum safety.
Never paint over wheel nuts – paint can hide cracks and affect torque. The zinc plating provides adequate protection; if the plating is worn, replace the nut.
Each batch of EZ9231530154 Nut Wheel Bolts is tested in an ISO 17025 accredited lab. Tests include: (1) Proof load test (hold at 830 MPa for 10 seconds, no permanent set), (2) Hardness test (Rockwell C scale, 5 samples per lot), (3) Thread gauge inspection (Go/No‑Go for class 6H).
(4) Salt spray test (ASTM B117, 240 hours, no red rust), (5) Microstructure examination (grain flow, decarbonization depth ≤0.05 mm), (6) Eddy current testing (100% of nuts for surface defects). (7) Torque‑tension test on a Skidmore‑Wilhelm gauge.
The nuts comply with ISO 898-2, VDI 2230, and OEM specifications. A certificate of conformance (EN 10204 3.1) is provided with each bulk order. The EZ9231530154 also meets the requirements of FMVSS 121 for wheel fasteners.
A North American logging fleet operating 80 HOWO trucks replaced all wheel nuts with the EZ9231530154. After 12 months of severe off‑road use, no wheel nut loosening events were recorded, and torque checks showed less than 5% variation from initial values – a dramatic improvement over the previous nuts, which required weekly re‑torquing.
A European bus company using SHACMAN chassis reported that the yellow zinc coating remained rust‑free after two winters of road salt, while competitor nuts showed corrosion after six months. The maintenance manager estimated a 40% reduction in nut replacement costs.
Each EZ9231530154 Nut Wheel Bolt is individually bagged in a VCI (vapor corrosion inhibitor) bag or supplied in bulk boxes of 50 or 100 pieces. The box is labeled with the OEM number, batch code, and a QR code for authentication.
The nut itself is stamped with “10” (property class) and a manufacturer’s traceability mark. A holographic SINOTRUK Homan sticker is affixed to the outer box. Counterfeit nuts often have a dull finish, missing hardness marks, or inconsistent thread quality.
Scan the QR code on the box to verify authenticity on the SINOTRUK Homan portal. Purchase only from authorized distributors – counterfeit nuts can lead to catastrophic wheel separation. Genuine EZ9231530154 also has a distinct golden‑yellow hue with a matte finish.
Summary: The SINOTRUK Homan Nut Wheel Bolt (OEM EZ9231530154) delivers Grade 10 strength, corrosion resistance, and precision fit for heavy‑duty truck wheels. Upgrade your wheel fasteners with genuine OEM nuts – the trusted choice for road safety and long‑term reliability.
If you have any questions about our products, services, or anything related to what we offer, please don’t hesitate to leave us a message—our dedicated team is always ready to provide prompt and helpful responses to address your concerns. What’s more, when you become our valued customer, we’re delighted to offer you complimentary catalog services, giving you access to detailed, up-to-date information on our full range of products, specifications, and offerings to help you make informed decisions.
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