Identify JR Products RV Window Knobs by Shaft & Shape
When the packaging is gone, a broken RV window knob can be identified by its operating shape and the shaft length. JR Products uses four triangular tri-lug numbers and three round-knob numbers in this comparison. Two knobs that look alike from the front may not have the same shaft length or connection.
Two styles to distinguish
Tri-lug window knobs
20165 and 20175 are the 9/16-inch shaft versions in white and black. 20185 and 20195 use a 13/16-inch shaft. Match both the three-lobed shape and the original connection.
Round window knobs
20345 is the black 1-inch shaft model. The 20355 white and 20365 black knobs are the 1/2-inch shaft models. Their round profile is not interchangeable with every tri-lug drive.
Exact manufacturer numbers
| JR Products MPN | Style | Listed shaft length | Colour | Mounting screw |
|---|---|---|---|---|
| 20165 | Tri-lug | 9/16 in | White | Included |
| 20175 | Tri-lug | 9/16 in | Black | Included |
| 20185 | Tri-lug | 13/16 in | White | Included |
| 20195 | Tri-lug | 13/16 in | Black | Included |
| 20345 | Round | 1 in | Black | Included |
| 20355 | Round | 1/2 in | White | Included |
| 20365 | Round | 1/2 in | Black | Included |
The sizes in this chart identify the manufacturer's knob/shaft models; they do not specify the mating drive profile for every RV window operator. Confirm both parts before installation.
Identify a loose or damaged knob
- Compare the face profile: three-lobed triangular or round. Then check the original MPN if available.
- Measure the knob's protruding shaft or original engagement depth and compare the matching manufacturer's drawing. Shaft length alone cannot establish shaft-drive fit.
- Inspect the operator connection and retaining screw for damage or worn threads. A replacement knob cannot fix stripped gears inside the operator.
- Make sure the window operates fully without the knob hitting the blind, screen or frame.
- Review the exact item's stated condition and supplied hardware. UsedRVParts viewing and pickup in Kelowna are by appointment.
Find the matching JR Products knob
Open the specific catalog item to review the photograph, condition and contents.
Related operating hardware
For a longer lever, see JR Products window crank handle identification. If the window mechanism itself is faulty, use the RV window operators and latches reference.
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