PowrLiner part 759-512 is a thin lock nut, 5/8-18 designed to secure components and prevent loosening from vibration on compatible PowrLiner sprayer models. This thin-profile lock nut features a locking mechanism that maintains clamping force even under constant vibration, while its reduced height allows use in space-constrained applications. Replacing a worn, stripped, or missing lock nut ensures components remain securely fastened during operation.
| Part Number | 759-512 |
|---|---|
| Part Description | Lock Nut, 5/8-18 (THIN) |
| Brand | PowrLiner |
| Fits | PowrLiner 2850, 1800M, 2800M |
| Condition | New |
The 759-512 Lock Nut is a precision-threaded fastener with a 5/8-18 thread size and thin profile design, used to secure components on compatible PowrLiner 2850, 1800M, and 2800M sprayer models. Its integrated locking feature prevents loosening caused by vibration during operation, while the reduced height allows use in applications with limited space.
Lock nuts are critical fasteners in applications where vibration is present, such as on wheel assemblies, motor mounts, pump components, and panel fasteners. Unlike standard nuts, lock nuts incorporate a locking mechanism—which may be a nylon insert, deformed threads, or other feature—that resists backing off under vibration. The thin profile (jam nut height) is specifically designed for applications where a full-height nut would interfere with other components or where limited thread engagement is available.
The 5/8-18 thread size indicates a nominal diameter of 5/8 inch with 18 threads per inch, a common coarse thread specification for medium-duty fastening applications. Over time, lock nuts can become worn at the threads, lose their locking effectiveness, or become corroded. A worn or damaged lock nut may allow components to loosen, leading to misalignment, increased wear, or potential safety hazards. Replacing with a new lock nut restores secure fastening and ensures reliable operation.
| Component securing | Holds components in place on 5/8-18 threaded studs or bolts |
|---|---|
| Vibration resistance | Locking mechanism prevents loosening from vibration |
| Space-saving design | Thin profile allows use in confined spaces |
| Worn threads | Threads are damaged and cannot maintain proper torque |
|---|---|
| Lost locking ability | Nut spins freely without resistance |
| Corrosion | Rust or chemical damage compromising nut integrity |
| Missing nut | Nut lost, component no longer secured |
PowrLiner part 759-512 is compatible with the following sprayer models. Always verify fitment using your equipment's parts diagram before ordering.
| Model | Component |
|---|---|
| PowrLiner 2850 | Lock Nut, 5/8-18 (THIN) |
| PowrLiner 1800M | Lock Nut, 5/8-18 (THIN) |
| PowrLiner 2800M | Lock Nut, 5/8-18 (THIN) |
When replacing lock nuts, these associated components are often inspected or replaced at the same time.
Inspect threads on the 5/8-18 bolt or stud for damage or wear.
Check flat or lock washers used with the nut; replace if worn.
Inspect the component being fastened for damage or wear.
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