Caterpillar 4E9311 Bolt
1. High Strength and Load Capacity: The Caterpillar 4E9311 bolt is made of high-strength alloy steel with a hardening treatment, providing tensile and compressive resistance under loads up to 800 MPa. It securely fastens heavy equipment components, preventing loosening even under intense vibration.
2. Perfect compatibility with original equipment: The bolt design and dimensions fully comply with Caterpillar standards, ensuring a precise fit with the mounting holes in the series' machines (e.g., excavators, dump trucks). This simplifies installation, eliminates the need for adaptations, and reduces the risk of component damage.
3. Durability in harsh conditions: The bolt has an anti-corrosion coating (zinc or chrome) that is resistant to moisture, dirt, chemicals, and temperature fluctuations (-30°C to +150°C). This increases its service life by 50% compared to standard bolts, reducing the frequency of replacements.
Product Introduction
The Caterpillar 4E9311 bolt is more than just a fastener; it's a critical component that ensures the reliability and safety of Caterpillar heavy-duty construction, mining, and agricultural equipment. In complex mechanical systems, every component contributes to overall performance, and this bolt ensures connection strength and withstands extreme loads and harsh conditions. Thanks to strict manufacturing standards and innovative solutions, the 4E9311 bolt has become an indispensable tool for professionals worldwide.
Production technology and choice of materials
The 4E9311 bolt's superior performance is due to its carefully selected material—grade 8 alloy steel, which boasts high strength and impact toughness. The manufacturing process begins with quality control of the blanks: each blank is inspected on specialized equipment to eliminate defects and meet ASTM A325 requirements. The blanks are then precision-machined on CNC (computer numerical control) machines, forming threads, heads, and other features with an accuracy of up to 0.005 mm. A key step is heat treatment: the bolts are hardened (860–880 °C) and tempered (480–520 °C) to increase the hardness to 33–39 HRC and relieve internal stress. The final step is the application of an anti-corrosion coating—galvanizing (8–12 µm thick) or chrome plating—to ensure corrosion resistance in high-humidity conditions and exposure to chemicals.
Technical characteristics and main advantages
Caterpillar 4E9311 bolts are available in standard sizes: 16 mm thread diameter, 60 mm length, and hex head (DIN 933 compliant), allowing for easy installation with a standard wrench. Their key technical characteristics are impressive: tensile strength up to 1000 MPa, yield strength up to 800 MPa, and maximum breaking load up to 25 kN. These properties allow these bolts to securely fasten heavy components such as engine cases, transmissions, and excavator working parts, even under severe vibration and overload conditions.
The first key advantage is their consistent strength over time. Thanks to alloy steel and heat treatment, the bolts do not deform or weaken even after 5,000 hours of operation under harsh conditions. This eliminates the risk of connection failure and equipment downtime.
A second advantage is perfect compatibility with genuine Caterpillar equipment. Bolt sizes and threads comply with brand standards, ensuring a perfect fit with the mounting holes of excavators (e.g., 320 GC, 336), dump trucks (725, 730), and tractors (D6, D8). Installation is quick and easy: no additional hole machining or adjustments are required, reducing maintenance time by 40%.
The third advantage is resistance to harsh conditions. The anti-corrosion coating prevents rust in humid environments (for example, when working near swamps or bodies of water), as well as when exposed to sand, dirt, and chemicals (for example, in mining). The bolts operate reliably over a wide temperature range—from -40°C (in northern regions) to +160°C (in direct contact with the engine)—without reducing performance. Practical application and operational examples
4E9311 bolts are widely used in critical Caterpillar equipment applications:
In transmission: they secure the transmission housings and shafts, ensuring uninterrupted power transmission.
In the working bodies of excavators: they fix the blades and bucket levers, withstanding the loads when extracting rock or soil.
In dump truck suspension systems, they secure suspension components, ensuring vehicle stability when driving on uneven surfaces. Under operating conditions at a mining facility in Kuzbass, Russia, 4E9311 bolts demonstrated outstanding performance: when Caterpillar 730 dump trucks were operating under conditions of constant vibration and sand exposure, the fastener life was increased by 60% compared to non-genuine bolts. This reduced replacement costs and increased fleet productivity by 15%.
Caterpillar Warranty and Support
Each 4E9311 bolt comes with a quality certificate detailing test results (strength, hardness, and corrosion resistance) and a batch number. Caterpillar provides a two-year or 2,000-hour warranty on this product. If a manufacturing defect is detected, the bolt will be replaced free of charge.
Product Photos
Exhibition cabinets
Getting to know the plant
The plant employs a team of highly qualified and experienced engineers who continuously innovate and improve its products. The company currently holds a number of independent intellectual property rights and patented technologies. Its construction equipment includes a wide range of excavators, loaders, cranes, bulldozers, and other machines. These products are distinguished by their high productivity, reliability, energy efficiency, and environmental friendliness, as well as the ability to adapt to challenging operating conditions in a variety of climates and environments worldwide.
Awards and qualificationsfication
frequently asked questions
1. Which countries do we export to?
Asia: Vietnam, India, Indonesia, Pakistan, Kazakhstan, Uzbekistan, etc.
Europe: Russia, Belarus, Ukraine, Lithuania, Saudi Arabia, etc.
South America: Brazil, Chile, Paraguay, Argentina, etc.
Africa: South Africa, Ethiopia, Libya, etc.
2.What payment terms can we accept?
Usually we can work on T/T, 30% TT before production and 70% TT before shipment
3.What logistics methods can we use for delivery?
1) For most of Europe, South America and Africa etc. countries, we can go by container or Roro via ocean freight.
2) For China's neighboring countries such as Russia, Vietnam, Kazakhstan, Uzbekistan, etc., we can deliver by road or rail.
3) For light spare parts in urgent requirement, we can ship it via international courier such as DHL, TNT, EMS or other air shipping.
4. How can you guarantee that you have delivered the goods to customers?
A: We will provide you with full delivery information for you confirmed.
5.What are our advantages compared with other manufacturers/factories?
1) Reliable quality: Carefully select reliable manufacturers to support spare parts such as engines, axles, transmissions, and many parts designed and produced by ourselves, always adopting the best materials.
2) Competitive price: Concentration of mechanized production in large quantities reduces production costs to ensure competitive price.
3) Service Team: Firstly, our sales managers are available 24/7, ready to answer your questions at any time. Secondly, our professional technical support team, with senior technicians, is ready to provide support to users and dealers. Most issues can be resolved within 24 hours.
4) Fast delivery: Generally, we can delivery within 10 working days in factory after receiving the advance payment from customers.
6. How can you provide after-sales service to customers?
A: We will reply you at the first time and help you solve the problems within 24 hours. If we really need your local, we
We will send your professional person to your locality to help you solve the problems without any hesitation, supply you with all-round
