Powr part 9820305 is a flat washer used in various assemblies across AirCoat, PowrTwin, PowrLiner, and Impact equipment. This washer distributes fastener load, protects surfaces from damage, and helps maintain proper clamping force. Replacing a missing, corroded, or deformed washer ensures secure fastening, prevents loosening due to vibration, and maintains the integrity of critical connections.
| Part Number | 9820305 |
|---|---|
| Part Description | Flat Washer |
| Brand | Powr |
| Fits | AirCoat (0508074A); PowrTwin 12000 Plus DI, 6900, 4900, 8900, 12000 Plus; PowrLiner 6950, 4950, 4955, 6955, 8955; Impact 1640, 1140, 840, 840 I and IA, 1140 I and IA |
| Condition | New |
The Powr 9820305 Flat Washer is an OEM‑specification washer used across a wide range of sprayers and pressure washers. It is installed under nuts or bolt heads to spread the clamping load, protect mating surfaces from damage, and prevent fasteners from loosening due to vibration. This simple but essential component helps maintain structural integrity and safe operation.
Over time, flat washers can become corroded, deformed, or lost during disassembly. A missing or damaged washer can lead to uneven clamping, surface damage, and fastener loosening – all of which can cause rattles, misalignment, or even component failure. Replacing with the correct OEM washer restores proper clamping force and ensures long‑term reliability.
| Load distribution | Spreads fastener load over a larger area to prevent surface damage |
|---|---|
| Vibration resistance | Helps maintain clamp force, reducing the chance of fasteners loosening |
| Surface protection | Prevents galling or marring of painted or soft materials |
| Missing washer | Washer lost during previous maintenance |
|---|---|
| Corrosion or deformation | Rust, pitting, or bending that affects its shape or strength |
| During reassembly | Always use new washers when rebuilding pumps or major assemblies |
| Loose fasteners | If a fastener repeatedly loosens, inspect the washer for damage |
Powr part 9820305 is used on the following equipment. Always confirm with your machine's parts diagram.
| Model | Component |
|---|---|
| AirCoat (0508074A) | Flat Washer |
| PowrTwin 12000 Plus DI | Flat Washer |
| PowrTwin 6900 | Flat Washer |
| PowrTwin 4900 | Flat Washer |
| PowrTwin 8900 | Flat Washer |
| PowrTwin 12000 Plus | Flat Washer |
| PowrLiner 6950 | Flat Washer |
| PowrLiner 4950 | Flat Washer |
| PowrLiner 4955 | Flat Washer |
| PowrLiner 6955 | Flat Washer |
| PowrLiner 8955 | Flat Washer |
| Impact 1640 | Flat Washer |
| Impact 1140 | Flat Washer |
| Impact 840 | Flat Washer |
| Impact 840 I and IA | Flat Washer |
| Impact 1140 I and IA | Flat Washer |
When replacing a flat washer, consider the fastener and the components it secures.
Inspect the fastener for wear, corrosion, or stripped threads; replace if necessary.
Check for thread damage; use a new lock nut or prevailing‑torque nut where specified.
Inspect the surface under the washer for damage that may have contributed to washer failure.
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