Original SANY Screw Hexagon Flange 169900000119A Construction Machinery Parts

The genuine SANY parts reference 169900000119A is the Screw, Hexagon Flange, a high‑strength fastener with an integrated wide flange and serrated bearing face, used in SANY heavy machinery for critical bolted joints subject to vibration. The 169900000119A hexagon flange screw eliminates the need for separate washers and provides superior resistance to self‑loosening.

Manufactured from alloy steel (grade 10.9) with a zinc‑flake coating, this screw delivers consistent clamp load and corrosion protection. Each 169900000119A unit is 100% inspected for thread conformity, flange dimensions, and hardness, guaranteeing reliable fastening in SRT dump trucks, SY excavators, SW wheel loaders, and motor graders.

Screw, Hexagon Flange

Винт с шестигранной фланцевой головкой

Tornillo de brida hexagonal

Screw, Hexagon Flange

Винт с шестигранной фланцевой головкой

Tornillo de brida hexagonal

Screw, Hexagon Flange

Винт с шестигранной фланцевой головкой

Tornillo de brida hexagonal

Material and Design of Screw, Hexagon Flange 169900000119A

The hexagon flange screw 169900000119A is cold‑formed from alloy steel (SCM435 / 35CrMo) and heat‑treated 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 screw head, providing a large bearing area without a separate washer.

The flange of 169900000119A has a diameter 1.5 times the nominal thread size, with radial serrations on the underside. These serrations bite into the mating surface, creating a positive lock that resists loosening under dynamic loads. The thread is rolled (not cut) to improve fatigue strength and grain flow, meeting ISO 965-2 standard. Full thread length is standard.

Surface treatment is a zinc‑flake coating (Geomet 500 or Delta Protekt) with integrated lubricant, thickness 8-12 µm, providing 480 hours of neutral salt spray resistance (ASTM B117). The lubricant ensures a stable friction coefficient of µ=0.12-0.16 for accurate torque‑tension control. Each 169900000119A screw is laser‑marked with the strength grade “10.9” and a batch code.

All 169900000119A screws are 100% inspected: thread go/no‑go, head height, flange concentricity, and hardness. A sample from each lot is proof load tested (e.g., 94 kN for M12) and must withstand the load without permanent set. Magnetic particle inspection detects surface cracks. Full traceability is maintained from raw material to final packaging.

Critical Applications of Screw 169900000119A in SANY Machinery

The hexagon flange screw 169900000119A is specified for high‑vibration bolted joints across SANY equipment. Typical applications include wheel hub retention on SRT dump trucks, track chain bolts on SY excavators, and attachment points for hydraulic cylinders on SW loaders. The serrated flange prevents loosening even under severe shock loads.

On SANY diesel engines (D07/D09/D12 series), 169900000119A screws secure the exhaust manifold studs, turbocharger mounting bolts, and injection pump brackets. In chassis applications, they are used on spring hanger bolts, steering linkage, and suspension arms. The screw’s high strength (grade 10.9) provides a safety margin for dynamic loads.

For engine rebuilds, always replace these screws when the corresponding nut is removed or if the screw has been torqued beyond yield. The serrations may be worn after one tightening cycle. Do not substitute with a plain hex screw plus lock washer – the integrated flange provides superior load distribution and locking action.

Compatible SANY Models & Interchange Information

The flange screw 169900000119A is used across SANY’s heavy equipment line: SRT45, SRT55, SRT95, SRT115 dump trucks; SY215 to SY500H excavators; SW305, SW405, SW465 wheel loaders; SMG200/220 graders; and STC crawler cranes. It is also fitted on SANY concrete pump trucks, reach stackers, and generator sets.

Common thread sizes for 169900000119A include M10x1.5, M12x1.75, and M14x2.0. The part number as listed represents a specific thread size (M12x1.75). Always verify the original screw thread and flange diameter. When ordering, specify 169900000119A to receive the correct grade 10.9, serrated flange screw with zinc‑flake coating.

For fleet maintenance, stock genuine 169900000119A screws. Aftermarket flange screws often use grade 8.8 material or lack proper serrations, leading to loosening and joint failure. Genuine SANY screws guarantee correct proof load, flange geometry, and corrosion resistance.

Technical Specifications – Screw, Hexagon Flange 169900000119A

Proper Installation of Screw, Hexagon Flange 169900000119A

Before installing the screw 169900000119A, clean the threaded hole and the flange contact surface. Do not use a washer under this screw – the serrated flange is designed to bear directly on the mating part. Apply a light coat of clean engine oil to the threads unless the SANY manual specifies dry assembly.

Thread the screw by hand until it contacts the joint surface, then use a calibrated torque wrench with a standard hex socket. Typical torque for grade 10.9 screws with M12 threads is 120 Nm ± 10%. Tighten in a cross pattern for multi‑screw joints. Do not exceed the recommended torque – over‑tightening can strip the threads or damage the serrations.

After torquing, mark the screw head and adjacent surface. Recheck torque after 100 operating hours for critical joints (wheel hubs, suspension). If the screw has loosened (mark no longer aligns), replace it with a new 169900000119A – the serrations may be flattened. Never reuse a flange screw that has been tightened before; the locking serrations take a permanent set.

Store genuine 169900000119A screws in a clean, dry environment. The zinc‑flake coating is durable but can be scratched. If the coating is damaged (bare steel visible), do not use the screw in corrosive environments. Always order sufficient quantity to complete the entire joint set.

Symptoms of a Damaged or Incorrect Screw 169900000119A

A loose 169900000119A screw will cause rattling or clicking from the joint, visible gaps between components, or fluid leaks if the joint is gasketed. On wheel hubs, a loose screw can cause wheel wobble and uneven tire wear. On engine mounts, it leads to excessive vibration. Re‑torque to specification; if the screw continues to loosen, replace it.

Over‑torqued screws may show thread necking (reduced diameter under the head) or a twisted shank. A screw that has been stretched beyond yield will have reduced clamp load and may snap under normal service. If you feel the torque wrench “spinning” without increasing torque, stop immediately. Replace the screw and inspect the threaded hole for damage.

Corrosion (red rust) on the screw shank or under the flange indicates coating failure. This weakens the screw and may cause seizure. Replace all corroded screws on that joint. For heavy rust, also inspect the mating flange. Always use genuine 169900000119A screws for replacement – never mix grades or types on the same joint.

Quality Assurance & Full Traceability for 169900000119A

Every hexagon flange screw 169900000119A is produced in an IATF 16949 certified facility under SANY’s quality system. Production steps include wire rod analysis, cold forming, thread rolling, heat treatment (quench and temper), and zinc‑flake coating. In‑process checks monitor hardness, thread dimensions, and flange runout.

Final inspection includes 100% optical sorting for hex size, flange diameter, and thread presence. A sample from each batch (5000 pieces) is proof load tested (87 kN for M12) and must show no thread stripping or fracture. Coating thickness is verified using XRF, and friction coefficient is measured on a torque-tension tester. A laser‑etched batch code on the screw head provides traceability to material cert, heat treat batch, and coating line.

For bulk orders, SANY supplies a Certificate of Conformance (CoC) confirming that all 169900000119A screws meet ISO 898-1 class 10.9, flange geometry per DIN 6921, and coating requirements. Independent third‑party audits ensure compliance with ISO 9001:2015 and IATF 16949. Use only genuine SANY screws for guaranteed locking performance.

Field Performance of Genuine SANY Hexagon Flange Screw

Field data from SANY equipment operating in Australian mines and Canadian oil sands shows that genuine 169900000119A screws maintain clamp load for over 10,000 operating hours in high‑vibration environments. The serrated flange provides effective locking without damaging the mating surface, and the zinc‑flake coating resists corrosion in salt‑spray conditions.

Aftermarket flange screws often use grade 8.8 material or lack full serrations, resulting in loosening within 2,000 hours. Genuine SANY screws exhibit consistent proof load and locking torque. Fleet owners report 90% fewer wheel screw loosening incidents after switching to 169900000119A screws.

To maximize service life, always replace screws that have been removed (the serrations are a one‑use locking feature). Use a torque wrench, not an impact gun. Store spares in a dry cabinet. Following these practices ensures reliable fastening and eliminates loosening‑related downtime.