4H7859 Nut for Caterpillar Equipment

The 4H7859 is a bearing lock nut for Caterpillar equipment, including Challenger machines and Caterpillar engine-machine applications. It is a new aftermarket spare part manufactured by CTP (Costex Tractor Parts).

The nut is specified for equipment using a 2.548-18 UNS thread. The supplied part is a single steel nut with a bearing-lock design and no specified coating.

Fitment

This part is listed for the following Caterpillar equipment types and models:

• Caterpillar Challenger 35
• Caterpillar Challenger 45
• Caterpillar Challenger 55
• Caterpillar Challenger VFS50
• Caterpillar Challenger VFS70
• Caterpillar 3116 engine-machine applications
• Caterpillar 3126 engine-machine applications
• Caterpillar 3208 engine-machine applications
• Caterpillar 3304 engine-machine applications
• Caterpillar 3306 engine-machine applications

The listed fitment covers Caterpillar Challenger equipment and Caterpillar engine-machine applications. Compatibility should be checked against the equipment model, serial number, and the part number removed from the machine before installation.

Cross-reference numbers

4H7859 and 4H-7859 are the two number formats identified for this nut. The Caterpillar equipment brand is used to identify the machines and engine-machine applications for which the part is listed; the part itself is manufactured by CTP.

Specifications

The imperial dimensions supplied for the part are 0.56 in length, 0.56 in height, and 3.37 in outside diameter. The metric package or item dimensions listed for reference are 8.5 cm length, 8.5 cm width, and 1 cm depth. Thread specification and outside diameter should be compared with the removed nut and the relevant Caterpillar equipment documentation.