160101120009A038 Hexagon Flange Bolt – High-Strength Fastener for SANY Engine Assemblies

Secure critical engine components with genuine SANY fasteners. The 160101120009A038 Hexagon Flange Bolt is a premium OEM-grade fastener engineered for high-stress applications in SANY heavy-duty diesel engines. This bolt features an integrated flange that distributes clamping load over a wider area, eliminating the need for a separate washer and reducing assembly time while improving vibration resistance. Trusted by engine rebuilders and fleet maintenance professionals worldwide, SANY parts deliver consistent clamp force, reliable torque retention, and long service life. With OEM number 160101120009A038, this hexagon flange bolt is documented in SANY engine bracket groups, front end cover assemblies, and alternator mounting systems, ensuring leak-free connections and structural integrity across SANY excavators, wheel loaders, and heavy trucks.

The hexagon flange bolt is an advanced fastener that combines the clamping force of a standard hex head bolt with the load‑spreading capability of an integrated washer. The deep‑offset flange eliminates the need for a separate washer, simplifies assembly, and reduces the number of loose parts per joint.

Secure attachment in high‑vibration engine applications is achieved through multiple high‑grade Hexagon Flange Bolt fasteners, which are designed to withstand extreme torque and vibrational stresses. Each Hexagon Flange Bolt ensures a reliable, long‑lasting connection between the engine and chassis, enhancing overall operational safety.

The flange face often incorporates a serrated or toothed pattern that bites into the mating surface, providing a positive locking mechanism that resists loosening under vibration. This design feature is particularly critical in diesel engine applications where sustained high‑frequency vibration is present.

Within SANY engine assemblies, the 160101120009A038 Hexagon Flange Bolt is used in critical areas such as engine bracket groups, front end cover groups, alternator brackets, and oil strainer groups. These assemblies rely on the bolt’s ability to maintain clamp force without loosening over thousands of operating hours.

The bolt is manufactured from high‑strength alloy steel and is typically supplied with a corrosion‑resistant surface finish such as zinc plating or zinc‑flake coating. This protection prevents rust formation that could compromise torque retention or make future disassembly difficult.

Unlike standard hex head bolts that require a separate washer, the flange bolt reduces assembly time and eliminates the risk of washer misplacement. The flange also prevents the bear metal surface from being damaged by the bolt head, preserving the integrity of sealing surfaces on engine blocks and housings.

During engine assembly, the 160101120009A038 Hexagon Flange Bolt must be installed using a calibrated torque wrench. The recommended torque is specified in the SANY service manual for each application. Typical torque ranges for flange bolts in engine applications are 80‑120 Nm for M12 bolts and 40‑60 Nm for M10 bolts. Always lubricate the threads with clean engine oil to achieve accurate clamp load.

The SANY D12 and D09 engines generate extreme torque and vibration during operation. A standard hex head bolt with a separate washer can work loose over time as the washer compresses or deforms. The integrated flange of the hexagon flange bolt eliminates this risk in multiple ways.

First, the flange increases the bearing area under the bolt head, reducing contact pressure on the mating surface. This prevents local yielding that would cause a separate washer to loosen.

Second, the serrated or toothed flange face digs into the mating surface during final tightening, creating a mechanical lock that resists rotation from vibration. This is a critical advantage for fasteners securing engine brackets, front end covers, and alternator mounts.

Third, the elimination of a separate washer reduces the number of components that can be dropped, misplaced, or incorrectly assembled during engine service.

The D12 engine delivers 360 kW (490 hp) at 1,900–2,100 rpm with a maximum torque of 2,150 Nm. It meets Euro VI emission regulations through its 1,800 bar common‑rail injection system. The D09 engine is a 9‑liter unit delivering 324–380 hp. Both engines rely on hexagon flange bolts for critical attachment points.

The D12 engine’s low idle speed of 525 rpm reduces component wear, but the transition from idle to full load produces rapid torque reversals in the fasteners. Only a bolt with a positive locking mechanism — such as the serrated flange of the 160101120009A038 — can maintain clamp force under these cyclic conditions.

When a hexagon flange bolt fails — due to over‑torquing, under‑torquing, or thread damage — the joint can separate, leading to misalignment, fluid leaks, or complete component detachment. In an engine bracket application, a loose bolt can allow the bracket to flex, eventually causing the bracket to crack or the bolt to snap.

Using a genuine SANY hexagon flange bolt ensures that the flange geometry, material hardness, thread rolling, and surface finish meet the specification required for the specific clamp load and vibration environment. A generic flange bolt may have a different flange angle or serration pattern, which can affect the locking performance and clamp load retention over time.

Correct installation of the 160101120009A038 Hexagon Flange Bolt begins with cleaning the threaded bore and the bolt threads. Remove old thread‑locking compound, corrosion, or debris. A thread‑chasing tap can be used to clean the bore, but never use a tap that removes material from the threads.

Lubrication of the bolt threads and the underside of the flange is required to achieve the specified clamp load. Use clean engine oil or the assembly lubricant prescribed in the SANY service manual. Do not use grease, as it can alter the torque‑tension relationship and lead to over‑torquing.

Install the bolt by hand until the flange contacts the mating surface. Use a torque wrench of the appropriate size and calibration. Tighten the bolt in a single pass to the torque specification listed in the service manual for the specific application. For critical joints, a two‑pass method (50% torque then final torque) may be specified.

The serrated flange does not require a separate tightening sequence, but care must be taken to avoid cross‑threading. The flange teeth will eventually seat into the mating surface; this is normal and contributes to the locking action.

During routine engine service, inspect accessible hexagon flange bolts for signs of loosening. A rust ring around the bolt head or evidence of fretting corrosion indicates that the joint has been moving and the bolt may have loosened. If any bolt is found to be loose, replace it and inspect the mating threads in the engine block.

Unlike torque‑to‑yield bolts that must be replaced after each use, hexagon flange bolts are often reusable if they are undamaged and have not been overtightened. However, if the bolt shows signs of thread damage, corrosion, or if the flange surface is worn from repeated tightening, replacement is recommended. When in doubt, replace with a new genuine SANY bolt.

The 160101120009A038 Hexagon Flange Bolt is a documented fastener in multiple SANY engine groups. It appears in the Engine Bracket Group (securing engine brackets to the cylinder block), the Front End Cover Group (attaching the front timing cover), and the Alternator Bracket Group (mounting the alternator to the engine block).

In the Fan Bracket Group, a similar Hexagon Flange Bolt (Part No. 160101120009A031) is used with a quantity of 4 units per assembly. The 160101120009A038 may be a variant for other flange diameters or thread lengths. Always cross‑reference the part number with your engine serial number to ensure compatibility.

The D12 engine is widely applied in SANY Kingway 435 heavy trucks, SYZ series dump trucks, concrete mixer trucks, and truck‑mounted pumps. The D09 engine is used in SANY concrete mixer trucks, crane carriers, urban dump trucks, and pump trucks.

Hexagon flange bolts are also used in SANY SY and SYH series excavators, wheel loaders, telehandlers, and STC series truck cranes equipped with D09 or D12 powerplants. In all these applications, the flange bolt is used wherever a high‑strength, vibration‑resistant connection is needed and the joint requires a large bearing area without a separate washer.

When ordering replacement hexagon flange bolts, provide your engine serial number (ESN) and specify which sealing location the bolt is intended for. The quantity of bolts required per assembly varies; for example, the Fan Bracket Group uses four hexagon flange bolts of a similar specification. Always purchase genuine SANY bolts from an authorized parts distributor.

Counterfeit or generic hexagon flange bolts often use inferior steel alloys, incorrect heat treatment, and imprecise flange geometry. These defects prevent the bolt from achieving the specified clamp load or maintaining torque retention under vibration. A generic bolt with a poorly formed flange may not seat correctly, leading to inconsistent clamp load and eventual joint loosening.

Generic bolts may also lack the critical serrations on the flange face. Without these serrations, the bolt has no vibration‑resistant locking mechanism and will be more likely to back out under sustained engine vibration. Reusing a flange bolt that has lost its serration can also lead to clamp load loss.

The OEM 160101120009A038 Hexagon Flange Bolt is manufactured under strict SANY quality assurance protocols. Each batch is subject to dimensional verification, thread gauge inspection, hardness testing, and sample torque‑tension validation. The flange angle and serration pattern are precisely controlled to ensure the locking performance meets SANY’s specification.

The traceability system for the 160101120009A038 Hexagon Flange Bolt allows SANY’s global dealer network to verify the origin and quality of each component throughout the supply chain. Genuine bolts are backed by comprehensive warranty coverage, providing fleet managers and equipment owners with assurance that their maintenance investments are protected.

Protect your investment in SANY heavy machinery by always specifying OEM‑grade fasteners that match the original equipment specifications. The 160101120009A038 Hexagon Flange Bolt ensures consistent clamp force, prevents joint loosening, eliminates the need for separate washers, and contributes to the overall reliability and extended service life of your equipment.

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