4J8734 Nylon Locknut for Caterpillar Equipment

4J8734 is a steel nylon-insert locknut used on Caterpillar engines and machines. The part is used with Caterpillar 3408, 3408C, 3408E, 3412, 3412D, 3412E, C15, C18, C27, and C9 engine and machine applications. This is a new aftermarket spare part manufactured by CTP (Costex Tractor Parts).

The locknut is identified as a nylon-insert nut and is intended for threaded connections requiring a locking function. The supplied product is a single locknut identified by SKU 4J8734. The available data specifies the thread, dimensions, material, surface treatment, and equipment applications listed below.

Fitment

• Caterpillar 3408
• Caterpillar 3408C
• Caterpillar 3408E
• Caterpillar 3412
• Caterpillar 3412D
• Caterpillar 3412E
• Caterpillar C15
• Caterpillar C18
• Caterpillar C27
• Caterpillar C9

The listed applications are Caterpillar engine and machine assemblies. Compatibility should be checked against the equipment model and the part number before installation, particularly where several engine configurations are available.

Cross-reference numbers

• 4J8734
• 4J-8734

4J8734 and 4J-8734 are the two number formats provided for the same locknut identification. The hyphenated format is included as a part-number reference for catalog and service-document searches.

Specifications

The dimensions and weight are stated according to the available product data. Thread designation, nut dimensions, and locking-element type are the primary identification parameters for selecting this part. The component should be installed in accordance with the applicable Caterpillar equipment service documentation and the requirements of the threaded assembly.