Original SANY Bolt Hexagon Flange 168899000008 Construction Machinery Parts

The genuine SANY parts reference 168899000008 is the Bolt, Hexagon Flange, a high-strength fastener with an integrated wide flange that distributes clamping pressure and resists vibration loosening in SANY heavy machinery. The 168899000008 hexagon flange bolt is designed for critical bolted joints such as axle housings, engine mounts, and structural connections.

Manufactured from chromoly alloy steel (grade 10.9) with a zinc-flake coating, this bolt provides excellent tensile strength and corrosion resistance. Each 168899000008 unit is 100% tested for hardness, thread accuracy, and torque consistency, ensuring reliable fastening in SRT dump trucks, SY excavators, SW loaders, and motor graders.

Bolt, Hexagon Flange

Болт с шестигранной фланцевой головкой

Perno de brida hexagonal

Material and Design of Bolt, Hexagon Flange 168899000008

The hexagon flange bolt 168899000008 is forged from chromium-molybdenum alloy steel (SCM435 / 35CrMo), quenched and tempered to property class 10.9 per ISO 898-1. Minimum tensile strength is 1040 MPa, yield strength 940 MPa, with hardness 32-39 HRC. The flange is cold-formed integrally with the head, providing a large bearing surface without a separate washer.

The flange of 168899000008 features radial serrations on its underside. These serrations bite into the clamped part, creating a positive lock that prevents self-loosening under shock and vibration. The flange diameter is 1.4-1.6 times the nominal thread size, distributing clamp force over a wider area to protect softer materials like aluminum housings.

Threads are rolled (not cut) to improve grain flow and fatigue strength. Thread tolerance is 6g, with a run-out thread chamfer for easy starting. The coating is a zinc-flake system (Geomet 500 or equivalent) with integrated lubricant, thickness 8-12 µm. It provides 720 hours of neutral salt spray resistance per ASTM B117. The coating’s friction coefficient is controlled to µ=0.12-0.16 for consistent torque-tension.

All 168899000008 bolts are 100% inspected: thread go/no-go, head height, flange squareness, and hardness HRC. A sample from each heat treat lot is proof load tested (e.g., 94 kN for M12). Magnetic particle inspection detects surface cracks. A laser-etched batch code on the head ensures traceability to material cert, heat treat batch, and coating line.

Critical Uses of Bolt 168899000008 in SANY Machinery

The hexagon flange bolt 168899000008 is specified for high-stress joints across SANY’s heavy equipment line. Typical applications include final drive mounting to axle housings on SRT dump trucks, swing bearing attachment on SY excavators, and wheel hub retention on SW loaders. Its serrated flange eliminates lock washers and reduces assembly time.

On SANY diesel engines (D07, D09, D12 series), 168899000008 bolts secure the vibration damper, front timing cover, and oil pan rails. In suspension systems, they attach strut mounts and control arm brackets. The bolt’s high strength and locking flange ensure these joints remain tight even under extreme shock loads from mining and construction work.

For engine rebuilds, always replace connecting rod bolts and cylinder head bolts with genuine 168899000008 fasteners. These torque-to-yield bolts are designed for one-time use. Reusing them risks fatigue failure. Always follow SANY workshop manual for specific torque values and angle-tightening sequences.

Compatible SANY Models & Part Interchange

The flange bolt 168899000008 is used across many SANY models: SRT45, SRT55, SRT95, SRT115 dump trucks; SY215, SY335, SY395, SY500H excavators; SW305, SW405, SW465 wheel loaders; SMG200, SMG220 motor graders; and STC crawler cranes. It also appears on SANY concrete pump trucks and reach stackers.

Typical thread sizes for 168899000008 include M10x1.5, M12x1.75, M14x2.0, and M16x2.0, with grip lengths from 25 mm to 120 mm. The part number as listed represents a specific length and thread configuration – always verify using the SANY parts catalog or measure the original bolt. Do not substitute with plain hex bolts plus washers.

For fleet maintenance, standardize on genuine 168899000008 bolts to guarantee correct flange diameter, serration pattern, and coating. Aftermarket flange bolts often use lower grade steel (8.8) or lack proper serrations, leading to loosening and joint failure. Genuine SANY bolts provide consistent clamp load and vibration resistance.

Technical Specifications – Hexagon Flange Bolt 168899000008

Proper Installation of Hexagon Flange Bolt 168899000008

Before installing the 168899000008 bolt, clean the threaded hole and the flange contact surface. Do not use any additional washer – the serrated flange is designed to bear directly on the mating part. Apply a thin film of clean engine oil to the threads unless the SANY manual specifies dry assembly.

Tighten using a calibrated torque wrench. Typical torque for M12 x 1.75 grade 10.9 is 110 Nm ± 10%. For torque-to-yield applications (e.g., cylinder head bolts), follow the angle method: initial torque 50 Nm, then +90° + 90°. Always use new 168899000008 bolts for such critical joints. Do not reuse old bolts.

After torquing, mark the bolt head and adjacent surface. Recheck torque after 100 hours of operation for non‑critical joints. If any bolt has loosened, replace it – the serrations may be damaged. Never mix old and new bolts on the same joint; always replace all bolts in that pattern.

Store genuine 168899000008 bolts in a clean, dry box. The zinc-flake coating is semi‑sacrificial; avoid scratching. If coating is damaged (red rust visible), do not use the bolt. Order enough bolts to complete the entire joint set. Use SANY original fasteners for safety‑critical assemblies.

Symptoms of a Damaged or Worn Bolt 168899000008

A loose 168899000008 flange bolt typically causes a knocking sound from the joint, visible movement between parts, or fluid seepage from gasketed connections. On wheel loaders, loose flange bolts on the axle housing produce wheel wobble and uneven tire wear. Immediate re‑torquing is required, but if the bolt has rotated more than 10°, replace it.

Over‑torqued or stretched bolts (beyond yield) will show thread necking or a reduced shank diameter. You may feel the torque wrench spinning without reaching the final angle (loss of resistance). Replace any bolt that shows visible thread deformation. A bolt that has been over‑torqued can snap suddenly under normal load.

Corrosion on the flange or shank indicates coating failure. Red rust around the bolt head or along the thread compromises clamp load and promotes seizure. Replace all corroded bolts on that joint. For heavy corrosion, also inspect the tapped hole in the casting for thread damage. Always use genuine 168899000008 for replacement.

Quality Assurance & Full Traceability for 168899000008

Every hexagon flange bolt 168899000008 is manufactured in an IATF 16949 certified facility under SANY’s quality management system. Production steps include wire rod analysis, cold heading, thread rolling, heat treatment (quench and temper), and coating. In‑process checks monitor hardness, case depth, and decarburization.

Final inspection includes 100% optical sorting for head geometry, flange diameter, and thread presence. A sample from each lot (5000 pieces) is proof load tested (94 kN for M12) and must show no permanent set. Coating thickness and friction coefficient are verified. A laser‑etched batch code on the bolt head provides full traceability to material cert, heat treat graph, and coating line.

For bulk orders, SANY supplies a Certificate of Conformance (CoC) confirming that all 168899000008 bolts meet ISO 898-1 class 10.9, flange geometry per DIN 6921, and coating salt spray requirements. Independent third‑party audits ensure continuous compliance with ISO 9001:2015 and IATF 16949. Use only genuine SANY fasteners for guaranteed reliability.

Field Performance of Genuine SANY Hexagon Flange Bolt

Field data from SANY equipment operating in Australian iron ore mines and Canadian oil sands shows that genuine 168899000008 bolts maintain their clamp load for over 12,000 hours. The serrated flange outperforms standard hex bolts with lock washers, reducing re‑torquing frequency by 65% and eliminating loosening‑related failures.

Aftermarket flange bolts often fail within 2,000 hours due to inadequate serration depth, lower strength grade (8.8), or poor coating that rusts quickly. Genuine 168899000008 bolts exhibit superior fatigue resistance, with no reported shank fractures in normal service. Fleet owners report that standardizing on genuine SANY bolts eliminates mysterious loosening complaints.

To maximize service life, always replace bolts that have been torqued beyond yield (e.g., connecting rod bolts) with new genuine 168899000008. For static joints, inspect bolts for corrosion at every major service (2000 hours) and replace any with visible rust. Following these practices ensures safe, reliable machinery operation.