Description
Reviews
| Brand | - |
| Category | Electronic Components Market / Connectors |
| Origin | - |
| Model Number | KN21-16-Y-6.0 |
| Inner Diameter | 6mm |
| Outer Diameter | 21mm |
| Material | High-Impact Plastic |
| Color | Yellow |
| Compatible Equipment | Inverter Argon Arc Welders |
| Function | Potentiometer Control Knob |
| Mounting Type | Push-Fit on Shaft |
| Package Quantity | 1 Piece |
| Weight | 8 grams |
Anonymous
Mar 31, 2026
Rating: 5/5
Perfect replacement part
My old welder knob broke off, and this fit perfectly on the 6mm shaft. The yellow color makes it easy to spot in my toolbox.
Anonymous
Mar 27, 2026
Rating: 5/5
Saved my project
I thought I had to replace the whole potentiometer assembly, but this cap saved the day. Fits like a glove.
Anonymous
Mar 25, 2026
Rating: 5/5
Great for argon arc welders
Installed this on my inverter welder immediately. The grip texture is decent, and it controls the amperage smoothly.
Anonymous
Mar 19, 2026
Rating: 5/5
Exact dimensions
Measured the ID and OD with calipers; it matches the 6mm and 21mm specs exactly. No wobble during operation.
Anonymous
Mar 15, 2026
Rating: 4/5
Good quality plastic
Feels sturdy enough for daily workshop use. It snaps on securely without being too tight. Would buy again if needed.
Anonymous
Mar 13, 2026
Rating: 4/5
Simple and effective
Nothing fancy, just a solid replacement knob. Shipping was fast, and the price was very reasonable for a spare part.
Q: Is this knob heat resistant for welding environments?
A: Yes, it is made from high-impact plastic suitable for standard welding shop temperatures, though direct contact with the welding arc should be avoided.
Q: Are other colors available for this specific model number?
A: The model number KN21-16-Y-6.0 specifically denotes the Yellow version. Other colors may have different suffixes in the model number.
Q: Will this fit a shaft that is slightly larger than 6mm?
A: This knob is designed specifically for a 6mm inner diameter. Forcing it onto a larger shaft may crack the plastic or result in a loose fit.
Q: Does it come with a set screw for extra security?
A: No, this model relies on a friction push-fit design. The internal geometry provides sufficient grip for normal potentiometer adjustment.
Q: Can I use this on non-welder equipment with a 6mm shaft?
A: Absolutely. As long as your equipment has a 6mm round shaft requiring a control knob, this part will function correctly.
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