Komatsu D355 Bulldozer Domed Head Sprocket Segment Bolt & Nut Set

Komatsu D355 Domed Head Segment Bolt & Nut Set is a high-strength fastening solution specifically developed by GFM for heavy-duty bulldozer undercarriage systems. In highly challenging operating environments such as mining and rock excavation, drive segments endure continuous high loads and frequent severe impacts, which demand extremely strict shear strength and anti-loosening performance from fasteners. Leveraging over ten years of experience in undercarriage component manufacturing, GFM uses selected alloy steel materials and precision heat treatment processes to craft high-quality track bolts and nuts products that precisely match original mounting holes while featuring excellent wear resistance and fatigue strength, providing global buyers and equipment users with safe and reliable aftermarket spare parts assurance.

Product Specifications & Technical Parameters

GFM specifically develops high-reliability fasteners for heavy construction machinery, among which the Komatsu D355 domed head segment bolt and nut set is designed for high-load, shear-resistant operating conditions. As a professional bolts and nuts supplier, our products utilize precision forging processes and precise thread machining to perfectly match original mounting holes.

Product Features

Komatsu D355 Domed Head Segment Bolt & Nut Set is a high-performance track bolts and nuts fastening assembly designed specifically for heavy bulldozer track drive segments. Its main features include:

• Premium Material, Long-Lasting Durability: Made of high-quality 40Cr/42CrMo alloy steel, carefully selected and quenched & tempered to ensure superior wear resistance and shear strength (tensile strength $\ge$ 1200 MPa) in heavy-duty operations, making every bulldozing operation stable and reliable.

• Precise Fit, Easy Installation: Bolt and nut dimensions (M24x1.5×90 / M24x1.5x30Hx36S) are controlled with strict tolerances to perfectly fit OEM drive segments and hubs, effectively preventing bolt loosening and thread stripping caused by strong vibration or high loads, ensuring fast installation and long-lasting fastening.

• Domed Head + Self-Locking Nut Design: This unique structural combination enhances stress distribution and anti-loosening performance at the connection site, effectively preventing segments from loosening or falling off under severe impacts. It performs exceptionally well in various harsh environments, including mining overburden stripping, rock construction, and large-scale earthwork engineering.

• Reduced Maintenance Costs: Wear-resistant high-strength materials and precise heat treatment processes minimize breakage and replacement frequency, extending the service life of undercarriage segments and fasteners, helping maintain efficient equipment operation while saving significant downtime and maintenance costs.

Product Description

• Raw Material: 40CR
• MOQ: 1 PC
• Payment Method: T/T
• Brand: GFM
• Condition: New
• Color: Yellow, Black or Customized
• Lead Time: 30 days
• Warranty: 1 Year
• Service: OEM or ODM
• Place of Origin: Fujian, China
• Application: Excavator
• Packing: Standard Export Wooden Pallet

Features

• High-Strength Alloy Steel: Engineered for durability in heavy-duty applications, ensuring long-lasting performance.
• Precision Engineering: Designed for a perfect fit, providing reliable and efficient operation with your machinery.
• Heat Treatment: Enhanced hardness and strength, extending the lifespan of the bolts for continuous performance.
• Anti-Loosening Design: Keeps bolts securely fastened, even under intense operating conditions.
• Corrosion Protection: Coated to resist rust and withstand harsh environmental conditions, ensuring reliability in all environments.

Specifications

Product Models

Production Process

Packaging and Shipping

Quality Assurance

GFM has established a strict quality management system, achieving full-process traceability from raw material procurement to finished product delivery. As a trustworthy bolts and nuts supplier, we deeply understand that the reliability of heavy construction machinery fasteners directly relates to overall equipment safety, which is why quality control is integrated into every detail of the manufacturing process.

In the specific quality control execution flow, GFM strictly implements the following standardized inspection tests:

• Raw Material Spectrometric Analysis: Selects high-quality high-strength alloy steel (40Cr/42CrMo) and verifies chemical composition via spectrometer before warehouse entry to ensure material purity and hardenability.

• Microcomputer-Controlled Heat Treatment Monitoring: Utilizes automated control for quenching and tempering heat treatment processes to ensure uniform metallographic structure inside bolts, achieving the optimal hardness range of HRC 39-44.

• Multi-Dimensional Destructive & Non-Destructive Testing: Every batch of products must pass thread go/no-go gauge inspection, magnetic particle testing (MT), and tensile testing machine strength tests to ensure tensile strength consistently reaches above 1200 MPa.

Through this complete inspection mechanism, GFM controls product defect rates to extremely low levels. We solemnly promise a quality warranty period of no less than 1 year or 2000 hours for every batch of segment bolt sets delivered, fully eliminating customers’ worries.

Factory Advantages

GFM is an experienced professional component manufacturer that has been deeply engaged in the field of excavator and bulldozer undercarriage parts since 2011. We focus on large-scale production of standardized products, and our manufactured high-quality track bolts and nuts are fully compatible with mainstream market models such as Komatsu, Caterpillar, Hitachi, Volvo, Kobelco, Doosan, Hyundai, SANY, Shantui, and more.

Modern manufacturing workshops and advanced production equipment serve as our solid backing for maintaining high-quality output:

• Advanced Equipment Production Lines: The factory is equipped with modern forging flow lines, multi-station cold headers, automated heat treatment furnaces, and CNC machine tools, fully guaranteeing component machining accuracy.

• Large-Scale Production Capacity Assurance: Relying on efficient automated production scheduling, monthly output of threaded fasteners stably reaches above 500 tons, easily handling large-volume spot stocks and regular procurement order needs.

• Rich Product Matrix: Beyond fasteners, GFM’s product line covers track rollers, carrier rollers, idlers, sprockets, track shoes, track links, and bucket tooth pins among undercarriage spare parts, facilitating one-stop bundled procurement for customers.

Relying on a professional engineering technical team and a rigorous international trade service system, GFM products have been exported to multiple countries and regions across Southeast Asia, the Middle East, Europe, and the Americas. As a reliable spare parts supplier, we will continuously provide stable, high-quality supply chain support to overseas distributors and large construction fleets worldwide.

Whether you are a wholesaler looking for cost-effective bulldozer segment bolts, or a large construction fleet requiring undercarriage fasteners compatible with multiple models, GFM can provide you with the most competitive factory-direct solutions. Contact our sales and service team right away to receive detailed product specification sheets, exclusive bulk wholesale discounts, and free samples for testing!