4W7021 Nozzle Assembly for Caterpillar

The 4W7021 Nozzle Assembly is a fuel injection system component used with Caterpillar equipment. It is listed for Caterpillar engines, industrial engine applications, and generator equipment, including the 3408, 3408B, 3408C, and 3412C engine models, as well as WEG generator applications.

This is a new aftermarket spare part manufactured by CTP (Costex Tractor Parts). The part is identified by SKU 4W7021 and is also written as 4W-7021 in equipment and parts references.

The product designation “Nozzle As” indicates a nozzle assembly. The available application data connects this part with Caterpillar engine and generator equipment. The information below reflects the listed model and dimensional data for this part number.

Fitment

• Caterpillar 3408 engine
• Caterpillar 3408B engine
• Caterpillar 3408C engine
• Caterpillar 3412C engine
• Caterpillar industrial engine applications
• Caterpillar engine and generator kit applications
• WEG generator applications

The listed fitment includes both individual engine models and equipment categories. The 3408, 3408B, and 3408C designations are included in the available application information, together with the 3412C model. “Engine - Industrial” and “Engine and Generator Kit” are listed as application groups rather than separate model numbers.

Cross-reference numbers

4W7021 and 4W-7021 are the two number formats provided for the same listed nozzle assembly. The hyphenated format is commonly shown in equipment parts references, while 4W7021 is used as the product SKU.

Specifications

The dimensional and weight values are reproduced from the available product data. The source lists length in both inch and metric fields, with the metric measurements separately identified as length, width, and depth. No additional information is provided for thread type, material, spray pattern, opening pressure, individual components, or installation position.