2H3789 Nylon Locknut for Caterpillar Equipment

2H3789 is a self-locking hex nut used as fastening hardware on Caterpillar equipment. The part has a nylon locking element and a standard coarse internal thread with a size of 5/8-11. This is a new aftermarket spare part manufactured by CTP (Costex Tractor Parts).

The nut is identified as a nylon locknut and as a self-locking hex nut. Its listed finish is galvanized, with zinc-plated coating specified in the product identification. The available product data does not identify a particular Caterpillar machine model, series, assembly position, or installation location, so fitment is stated at the equipment-brand level only.

Cross-reference numbers

• 2H3789
• 2H-3789

Specifications

The 5/8-11 designation describes a coarse-thread inch fastening size: the nominal thread diameter is 5/8 inch and the thread pitch is 11 threads per inch. The self-locking construction includes a nylon element that engages the mating bolt or threaded stud during assembly. Installation torque, tightening procedure, reuse limits, and the corresponding bolt or stud specification are not provided in the available product data.

The listed dimensions are reproduced from the supplied specification. The source labels the vertical dimension as “Nut Height - 2”” and the across-width dimension as “Nut Width - 3””; the numerical values are presented above without assigning a different measurement convention. No washer, bolt, stud, or additional fastening hardware is specified as included with this part.