Terex
Hex Nylock nut for Terex PT30
This 3/8-16 UNC zinc-plated hex Nylock nut is a fastening component used in the assembly of the ROPS cab on the Terex PT30.
Parts diagram
Compatible models
Specifications
- Part number
- 8040-486
- Brand
- Terex
The 8040-486 hex Nylock nut serves as a specialized fastener for securing the ROPS cab structure on the Terex PT30 machine. This component features a 3/8-inch diameter and a 16 threads per inch (UNC) pitch. The nut is finished with a zinc coating and includes an integrated nylon insert within the threads to provide resistance against loosening caused by operational vibrations. By creating consistent friction against the mating bolt, this nut maintains the integrity of the cab assembly.
This specific fastener is designed for use in the Terex PT30 and is manufactured according to the 3/8-16 UNC specification. The nylon insert design is standard for applications where vibration is present, ensuring that the assembly remains secure during machine operation. Proper installation of these nuts is necessary to maintain the structural alignment of the operator cab and related mounting points.
Hex Nylock nuts are commonly utilized in heavy machinery to prevent fasteners from backing off due to mechanical movement. The nylon ring deforms over the bolt threads, creating a locking effect that holds the fastener in place without the need for additional locking washers or adhesives.

