The Graco 166205 Ring Coupling is an OEM locking ring for the fluid section. Use it to maintain seal compression and alignment in high-pressure operation.
The Graco 166205 Ring Coupling is an OEM coupling ring used to secure mating components in the fluid section assembly of select Graco spray equipment. Use it to maintain correct clamping force, sealing integrity, and alignment within the pump/housing interface.
A specific model list is not published for this part. Please confirm by checking your sprayer’s parts diagram for item “Ring, Coupling” with part number 166205.
| Part Number | 166205 |
|---|---|
| Item Name | Ring, Coupling |
| Brand | Graco (Genuine OEM) |
| Primary Function | Locks/retains adjoining fluid-section components to maintain seal compression and alignment under pressure. |
| Typical Location | Fluid section / pump housing interface (see your model’s exploded view). |
| Fitment Note | Match by model + serial and verify the exact item number in your parts manual before ordering. |
Designed for durability in high-pressure applications, this coupling ring helps preserve sealing integrity and prevents micro-movement that could lead to leaks or premature wear. Using the correct OEM ring supports long service life and reliable performance of the fluid section assembly.
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