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High-Quality Track Bolt and Nut 9W3619 9W3361 from China Suppliers - Durable Excavator Parts Factory
Product Highlights
High Tensile Grade
12.9 grade high tensile earthmoving tension bolts.
Grade 12.9 Certification
Delivers 1200 MPa tensile strength and 1080 MPa yield strength for heavy-duty industrial applications.
Alloy Steel Core
Utilizes 35CrMo/42CrMo materials with precision heat treatment for consistent mechanical stability.
Undercarriage Optimized
Specifically engineered for track chains, sprockets, and roller assemblies in earthmoving equipment.
Corrosion-Resistant Finish
Zinc plating or Dacromet coating options extend service life in wet and corrosive conditions.
Customization & Rapid Turnaround
Accepts sample/drawing-based production with flexible MOQ and standardized export packaging.
Product Attributes
| Part NO. | 9W3619 & 9W3361 |
| Application | Excavator CAT320 |
| Certification | CE, ISO9001: 2000 |
| Material | 40CR |
| Warranty Time | 2000 Hours |
| MOQ | 100 PCS |
| Package Size | 150cm * 150cm * 150cm |
Frequently Asked Questions
Q
What does Grade 12.9 mean for these earthmoving tension bolts?
Grade 12.9 is the highest standard property class for metric bolts, indicating a tensile strength of 1200 MPa and a yield strength of 1080 MPa. This makes them suitable for extreme load-bearing applications such as excavator undercarriages and heavy earthmoving machinery.
Q
Which excavator models are these bolts compatible with?
These tension bolts (Part No. 9W3619 & 9W3361) are specifically designed for the Caterpillar CAT320 excavator series, including undercarriage components such as track chains, sprockets, and roller assemblies. Custom compatibility with other models may be available upon request.
Q
What surface coating options are available to prevent corrosion?
Two corrosion-resistant finish options are available: standard zinc plating and Dacromet coating. Dacromet is particularly recommended for highly corrosive or wet environments, offering superior protection compared to conventional zinc plating without introducing hydrogen embrittlement risk.
Q
What is the minimum order quantity (MOQ) and lead time?
The standard minimum order quantity is 100 pieces per order. Lead times vary depending on order volume and customization requirements. The manufacturer supports flexible MOQ arrangements for sample or drawing-based custom production — please contact the supplier directly for specific lead time estimates.
Q
What materials are used and how are they heat treated?
The bolts are manufactured using 35CrMo or 42CrMo alloy steel, both widely recognized for their excellent strength-to-toughness ratio. Precision heat treatment processes — including quenching and tempering — are applied to ensure consistent hardness, mechanical stability, and fatigue resistance throughout the fastener.
Q
Are custom dimensions or specifications available?
Yes. The manufacturer accepts custom orders based on customer-provided samples or technical drawings. Products are packaged in standardized export-grade packaging (150cm × 150cm × 150cm per unit) to ensure safe international shipping. CE and ISO9001:2000 certifications are held for quality assurance.