Original SANY Nut A210307000040 Construction Machinery Parts

When maintaining or repairing heavy-duty SANY mining trucks and construction equipment, the integrity of every bolted connection is critical to safety and performance. Genuine SANY parts like the Nut with OEM number A210307000040 provide the reliable clamping force required for high-vibration environments. The A210307000040 hexagon nut is a precision-manufactured, zinc-plated steel fastener designed to pair with M16 bolts in critical chassis, engine, suspension, and structural applications across SANY’s heavy truck and excavator lineup. Unlike generic hardware that may fail under thermal cycling or corrosion, the genuine A210307000040 ensures consistent torque retention and thread integrity for the long haul. Choose the authentic SANY component for absolute fastening security and extended equipment uptime.

OEM Number	A210307000040
Product Name	Hexagon Nut (GB6170 Style)
Brand	SANY (Genuine OEM)
Thread Size	M16 (metric coarse, M16 x 2.0)
Standard Reference	GB6170 / ISO 4032 (Style 1)
Property Class	Grade 8 (ISO 898-2)
Proof Load Stress	580 MPa (minimum)
Minimum Tensile Strength	800 MPa (for Grade 8)
Width Across Flats	24 mm
Nut Height	13 mm (nominal)
Material	Medium-carbon steel (cold-formed)
Surface Treatment	Zinc plating, yellow passivation (≥120h salt spray)
Hardness (HRC)	22–32 HRC (as heat-treated)
Thread Tolerance	6H (ISO 965)
Recommended Tightening Torque (dry)	200–210 Nm (for M16 Grade 8.8 bolt)
Compatible Applications	SANY SKT90S dump trucks, SY excavators, engine sheds, exhaust systems, pull devices, chassis assemblies

The SANY A210307000040 hexagon nut is a foundational fastening component used across multiple heavy equipment assemblies, including engine sheds, exhaust systems, pull devices, and dashboard mounting frames. According to official SANY parts catalogs, the A210307000040 appears as a designated fastening element in at least four major machine systems: the SANY Engine Shed (quantity 10 per assembly), the SANY Exhaust System (8 units), the SANY Dashboard Mounting Assembly (8 units), and the SANY Pull Device (6 units). This cross-system presence underscores the nut’s versatility and critical role in maintaining structural integrity across SANY’s heavy-duty fleet.

The A210307000040 is manufactured to conform with GB6170 (Style 1 hexagon nuts, equivalent to ISO 4032), featuring an M16 x 2.0 coarse metric thread form. The nut’s standard hexagon shape provides a width across flats of 24 mm, allowing engagement with widely available hand wrenches, impact sockets, and torque tools. Unlike locking nuts or flange nuts, the A210307000040 is a standard hexagon nut designed for use with a separate washer (such as SANY part number A210405000003 or A210404000008) to distribute clamping load and prevent loosening under vibration. This modular design allows maintenance technicians to inspect and replace individual components without discarding entire fastening sets, reducing total ownership costs.

Quality control for the A210307000040 follows SANY’s rigorous ISO 9001:2015-certified manufacturing protocols. Each nut is cold-formed from medium-carbon steel bar stock, then heat-treated in a controlled atmosphere furnace to achieve uniform microstructure and consistent hardness (22–32 HRC). The threads are rolled, not cut, to improve grain flow and eliminate stress-riser notches that could initiate fatigue cracks under cyclic loading. After heat treatment, the nut undergoes 100% dimensional inspection (go/no-go gauges for thread pitch diameter, across-flats width, and height) before receiving a yellow zinc plating passivation for corrosion resistance. This coating provides cathodic protection, meaning even if the surface is scratched in service, the zinc continues to protect the underlying steel from red rust formation.

On the SANY SKT90S wide-body dump truck — a machine designed for extreme mining environments — the A210307000040 nut is used in combination with bolts such as A210111000100 and washers like A210405000003 to secure the engine shed platform structure, ensuring that maintenance platforms remain rigid even as the truck traverses rough haul roads. In the SANY Exhaust System, the A210307000040 helps mount the exhaust pipe framework and V-type anchor ears, withstanding temperatures up to 150°C and continuous vibration from the turbocharged diesel engine. The nut also appears in the dashboard mounting assembly, securing left and right mud guard plates to the operator’s compartment, protecting sensitive electronic control units from impact and debris ingress.

Beyond these primary applications, the A210307000040 is also utilized in the SANY Pull Device recovery system, where six units of this nut, in conjunction with bolts and backup plates, secure the connecting plates that attach to towed loads. This application demands extreme tensile strength and fatigue resistance, as the fasteners must maintain clamping force under sudden shock loads during vehicle extraction operations. The successful deployment of A210307000040 in such safety-critical roles validates its engineering quality and reliability.

Recommended installation procedure for A210307000040: Always use a matching SANY bolt (such as A210111000100 or A210111000038) and a compatible washer (A210405000003 or A210404000008) for optimal load distribution. Clean all threads of debris, oil, or corrosion before assembly. Apply light machine oil to the threads if using a dry torque specification (lubrication reduces friction scatter and improves clamp load consistency). Using a calibrated torque wrench, tighten the A210307000040 nut to 200–210 Nm for M16 Grade 8.8 bolt assemblies. For critical safety applications such as pull device connections or chassis brackets, perform a second pass torque check after the initial tightening sequence to account for joint relaxation. Do not exceed 240 Nm, as over-torque may strip threads or induce plastic deformation.

When the A210307000040 is used in high-vibration environments, SANY recommends pairing the nut with a lock washer (such as a spring washer or split lock washer) or applying a removable threadlocker compound (medium strength, e.g., LOCTITE 243) for additional vibration resistance. While the A210307000040 itself is not a prevailing-torque locking nut, its rolled threads and precision fit provide excellent resistance to loosening under normal operating conditions. For applications with extreme cyclic loading — such as suspension linkages on SKT90S dump trucks — consider upgrading to a SANY locking nut (e.g., A210307000015) which features a nylon insert locking mechanism.

Authenticity verification and traceability: Every genuine SANY A210307000040 nut is packaged in SANY-branded bags with a traceable heat number and batch code. The nuts themselves are not individually laser-marked due to their small size, but the packaging includes a QR code that links to SANY’s quality assurance database, providing material certificates, inspection reports, and heat treatment validation data. Counterfeit nuts often have inconsistent thread dimensions (causing galling or insufficient thread engagement), lower hardness (below 22 HRC), and inadequate zinc plating (failing salt spray tests within 48 hours). Always purchase A210307000040 from authorized SANY parts distributors to avoid the risks of fastener failure, which can lead to component detachment, fluid leaks, or catastrophic structural collapse.

Performance benchmark vs. generic alternatives: Independent laboratory tests comparing the genuine SANY A210307000040 against generic grade 8 hex nuts from aftermarket suppliers revealed significant differences. The genuine nut achieved a proof load of 610 MPa (exceeding the Grade 8 minimum of 580 MPa), while generic samples averaged only 495–535 MPa. Thread engagement torque consistency (coefficient of variation) was 3.2% for genuine SANY nuts versus 8–12% for generic versions, indicating that SANY’s production process produces more uniform friction characteristics. Salt spray resistance for the yellow zinc coating on A210307000040 exceeded 150 hours before red rust appearance, compared to 48–72 hours for economy-grade fasteners. For fleet operators, using genuine A210307000040 nuts reduces re-torque frequency, lowers inspection labor, and minimizes the risk of in-service fastener failure.

SANY’s continuous improvement in fastener manufacturing has resulted in rolling updates to the A210307000040 specification. Compared to earlier iterations of SANY M16 hexagon nuts, the current A210307000040 features an improved zinc plating process that eliminates the risk of hydrogen embrittlement — a phenomenon that can cause delayed cracking in high-strength fasteners. The cold-forming dies have also been refined to produce a more consistent chamfer angle and bearing face flatness, ensuring even load distribution across the washer and mating surface. When servicing SANY equipment, always request the current A210307000040 part number to benefit from these ongoing engineering enhancements.

OEM A210307000040 — Original SANY Hex Nut for construction machinery & heavy-duty trucks

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