Adjustment Knob 39121
Brand: Eureka · Fits: 10 models · Reference price: $18.99
39121 is a Eureka replacement part (adjustment knob). Our fitment data lists 10 models that use it.
When to replace this part
Storage, trim and cosmetic hardware
Symptom: A cracked shelf, broken door bin, worn hinge, or missing trim piece -- cosmetic and storage wear rather than a functional breakdown.
Check: Match the physical dimensions and mounting tabs of the old part before ordering; these pieces are often model-specific even between visually similar models.
Models that use this part
| Model | Brand | Appliance | Parts on file |
|---|---|---|---|
| 5188AT | Eureka | — | 37 |
| 5184AT | Eureka | — | 24 |
| 5180AT | Eureka | — | 22 |
| AU4340AT | Eureka | — | 8 |
| 4480AT | Eureka | — | 6 |
| 4481AT | Eureka | — | 6 |
| 4481ATF | Eureka | — | 6 |
| 4380AT | Eureka | — | 5 |
| AU4465BT | Eureka | — | 5 |
| 4351DT | Eureka | — | 3 |
Part numbers it replaces
The manufacturer lists 39121 as the replacement for these earlier part numbers. Substitute parts can look different from the original but serve the same function.
Other parts for model 5188AT
If you are repairing that appliance, these are the most model-specific parts on file for the same model.
Reference price and where to compare
The reference price on file for this part is $18.99. It is informational only, not an offer or an Amazon price — RepairKitHub does not sell parts directly.
Compare 39121 listings on Amazon