JR Products RV Window Knobs: Tri-Lug vs Round Shaft Sizes
RV windows and vents can use a small turning knob instead of a longer crank handle. JR Products offers distinct triangular tri-lug and round replacements, with several shaft lengths and colours. Compare these exact part numbers before replacing a worn or missing knob.
Tri-lug versus round window knobs
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.
JR Products window-knob comparison
| 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.
Choosing the correct replacement
- Remove the old knob and identify whether its shaft and operating profile are tri-lug or round.
- Match the original part number or measure the shaft length: the tri-lug models are 9/16 or 13/16 inch, while these round models are 1 or 1/2 inch.
- Confirm the operator's mating socket, retaining screw and available clearance. The listed length is not a universal compatibility claim.
- Check the window's operating gear for wear before replacing the knob; a damaged mechanism may need an operator repair.
- Install the correct screw and test full movement without forcing the knob against the window frame or shade.
Shop by exact window-knob number
Select the original manufacturer number to see product information and availability.
Need a crank handle instead?
Our JR Products replacement crank-handle guide compares 1-, 1⅜- and 1¾-inch handles. For window latches, exit releases and opening mechanisms, see RV window operator identification.
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