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Home / Other Components / 30×10mm Star-Shaped Shaft Knob for Tube Amplifier Potentiometer Switch Cap, Guitar Volume Control Knob Cap

Attributes

Brand -
Category Electronic Components Market / Other Components
Origin -
Shape Star
Dimensions 30mm Diameter x 10mm Height
Material Durable Plastic with Metal Insert
Shaft Fitment 6mm Split Shaft Potentiometers
Compatibility Guitar, Bass, and Tube Amplifiers
Color Finish Matte Black
Mounting Type Push-On / Set Screw (Optional)
Weight 8 grams
Package Contents 1x Star-Shaped Knob Cap
Application Volume and Tone Control Replacement

6 reviews

A

Anonymous

Mar 23, 2026

Rating: 4/5

Great aesthetic upgrade

Looks fantastic on my amp. The only reason I didn't give 5 stars is that the set screw was a bit loose, but some thread locker fixed it right up.

A

Anonymous

Mar 19, 2026

Rating: 5/5

Perfect fit for my Stratocaster

This knob fits perfectly on my guitar's volume pot. The star shape gives it a cool vintage look, and the grip is excellent for quick volume swells.

A

Anonymous

Mar 11, 2026

Rating: 4/5

Good value

For the price, you can't beat it. It matches the other hardware on my pedalboard nicely. Shipping was fast too.

A

Anonymous

Mar 07, 2026

Rating: 5/5

Stylish and functional

The star design makes it easy to see the position of the knob even in low light. Works great on my bass guitar as well.

A

Anonymous

Mar 04, 2026

Rating: 5/5

Solid build quality

Very sturdy plastic. It doesn't feel cheap at all. The metal insert ensures it won't strip out when tightening it onto the shaft.

A

Anonymous

Mar 01, 2026

Rating: 5/5

Exactly what I needed

Replaced a broken knob on my tube amp. The 30mm size is substantial without being too big. Highly recommend for DIY repairs.

5 FAQ

Q: Can I use this for a tone control as well as volume?

A: Yes, absolutely. As long as your tone potentiometer has a compatible 6mm split shaft, this knob will work perfectly for both volume and tone controls.

Q: What is the maximum shaft length this can accommodate?

A: With a height of 10mm, it works best on standard potentiometer shafts. If your shaft is significantly longer, you may need to add washers underneath for proper alignment.

Q: Is the black finish glossy or matte?

A: The finish is a smooth matte black, which helps reduce glare on stage and hides fingerprints well.

Q: Does it come with a set screw?

A: It features a metal insert for durability. While it is primarily a push-on fit, many users add their own small set screw if extra security is needed for their specific application.

Q: Will this fit a solid shaft potentiometer?

A: This knob is designed primarily for split shaft pots. For solid shafts, you would need an adapter bushing or a knob specifically made with a set screw.

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