Skip to main content
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.

Explore your interests

View More
All Categories
Best Seller (30)
New List (30)
RC Model A07 PNP FPV Analog/Digital Racing Drone 7-Inch Aerial Photography Quadcopter Frame

RC Model A07 PNP FPV Analog/Digital Racing Drone 7-Inch Aerial Photography Quadcopter Frame

$1,643.00

ACCSOON SeeMo Monitor Converter for iPhone and iPad, Real-Time Monitoring and Live Streaming

ACCSOON SeeMo Monitor Converter for iPhone and iPad, Real-Time Monitoring and Live Streaming

$1,059.00

Solenoid Valve Initial Inspection Test Bench / Solenoid Valve Leakage Test Bench / Solenoid Valve Airtightness Test Bench

Solenoid Valve Initial Inspection Test Bench / Solenoid Valve Leakage Test Bench / Solenoid Valve Airtightness Test Bench

$7,482.00

Factory Direct Hardware Screw and Parts Automatic Weighing and Packaging Machine, Vertical Weighing and Packing Equipment

Factory Direct Hardware Screw and Parts Automatic Weighing and Packaging Machine, Vertical Weighing and Packing Equipment

$36,860.00

Commercial Heated Beverage Cabinet, Small Countertop Display Warmer with Constant Temperature for Supermarkets

Commercial Heated Beverage Cabinet, Small Countertop Display Warmer with Constant Temperature for Supermarkets

$1,099.00

Manufacturer Supply Standard Dual-Color Film Copy Paper Ink Water-Based Ink Gravure Printing Machine

Manufacturer Supply Standard Dual-Color Film Copy Paper Ink Water-Based Ink Gravure Printing Machine

$17,500.00

Gray Surface Pen for Sketching and Quick Drawing - Art Highlight Sketch Paper Blending Stump and Sponge Eraser Tool Set for Still Life, Geometry, and Portraits, Designed for Art Students and Exam Candidates, Complete Beginner Kit

Gray Surface Pen for Sketching and Quick Drawing - Art Highlight Sketch Paper Blending Stump and Sponge Eraser Tool Set for Still Life, Geometry, and Portraits, Designed for Art Students and Exam Candidates, Complete Beginner Kit

$6.80

Extra-Large Denture Storage Box for Seniors, Food-Grade Portable Cleaning and Soaking Container for Full Dentures

Extra-Large Denture Storage Box for Seniors, Food-Grade Portable Cleaning and Soaking Container for Full Dentures

$29.90

[Sheet Music Collection for Teachers] Continuously Updated – HD, No Watermark, Includes Tutorial Videos

[Sheet Music Collection for Teachers] Continuously Updated – HD, No Watermark, Includes Tutorial Videos

$49.90

Orthodontic Retainer Case for Invisible Braces, Portable Storage and Cleaning Box for Teeth Aligners and Dentures

Orthodontic Retainer Case for Invisible Braces, Portable Storage and Cleaning Box for Teeth Aligners and Dentures

$23.10

Portable Retainer Case for Braces, Orthodontic Clear Aligner Storage Box with Chewie and Removal Tool

Portable Retainer Case for Braces, Orthodontic Clear Aligner Storage Box with Chewie and Removal Tool

$3.98

Freestanding Multi-Tier Toilet Storage Rack for Bathroom, Laundry, and Balcony Organization

Freestanding Multi-Tier Toilet Storage Rack for Bathroom, Laundry, and Balcony Organization

$174.00

Biliansheng Hair Transplant and Care - Herbal Hair Nourishment Treatment Package

Biliansheng Hair Transplant and Care - Herbal Hair Nourishment Treatment Package

$480.00

Traditional Wooden Rattle Drum with Sheepskin Head for Babies - Chewable Handheld Toy with Fortune Zodiac Design

Traditional Wooden Rattle Drum with Sheepskin Head for Babies - Chewable Handheld Toy with Fortune Zodiac Design

$11.90

2026 Spring New FLTRP Grade 3 English Vocabulary & Sentence Flashcards for Classroom Teaching

2026 Spring New FLTRP Grade 3 English Vocabulary & Sentence Flashcards for Classroom Teaching

$8.42

Custom Signs and Labels New Version No Smoking Material Signs Five Boards One Diagram Fire Safety Instructions PVC Acrylic Number Plate

Custom Signs and Labels New Version No Smoking Material Signs Five Boards One Diagram Fire Safety Instructions PVC Acrylic Number Plate

$2.00

Water Brush Pen Set with Large Capacity, Gouache and Solid Watercolor Paints, Drawing Tools for Students and Beginners

Water Brush Pen Set with Large Capacity, Gouache and Solid Watercolor Paints, Drawing Tools for Students and Beginners

$32.00

Chineng Commercial Automatic Small Scallion Chopper, Multi-function Vegetable Cutter for Chili Slicing and Filling Preparation in Cafeterias

Chineng Commercial Automatic Small Scallion Chopper, Multi-function Vegetable Cutter for Chili Slicing and Filling Preparation in Cafeterias

$16,200.00

G80 Lifting Chain with Hook Head, Manganese Steel Alloy Chain for Hoisting Stones and Towing

G80 Lifting Chain with Hook Head, Manganese Steel Alloy Chain for Hoisting Stones and Towing

$79.00

Car Interior Button Frame and Window Switch Chrome Panel, New Energy Vehicle ABS Parts with Hot Melt Welding and Injection Molding

Car Interior Button Frame and Window Switch Chrome Panel, New Energy Vehicle ABS Parts with Hot Melt Welding and Injection Molding

$96.00

Foldable Multi-Function Tire Stone Removal Tool for Cars

Foldable Multi-Function Tire Stone Removal Tool for Cars

$53.60

Premium 3D Printing Pen RP600A, No Display, Best-Selling Gift for Kids, 3D Pen RP6

Premium 3D Printing Pen RP600A, No Display, Best-Selling Gift for Kids, 3D Pen RP6

$230.15

Marie's Thickened 8K Watercolor Pad, 16K Portable Sketchbook for Beginners and Art Students - Travel-friendly Multi-use Painting Book

Marie's Thickened 8K Watercolor Pad, 16K Portable Sketchbook for Beginners and Art Students - Travel-friendly Multi-use Painting Book

$7.23

Car Tire Stone Removal Hook - Stainless Steel Multi-Function Tool for Cleaning Pebbles from Treads

Car Tire Stone Removal Hook - Stainless Steel Multi-Function Tool for Cleaning Pebbles from Treads

$3.80

Premium Thickened 50% Wool Felt Mat for Calligraphy and Chinese Painting - Dedicated Tablecloth for Four Treasures of the Study; Ideal for Student Practice

Premium Thickened 50% Wool Felt Mat for Calligraphy and Chinese Painting - Dedicated Tablecloth for Four Treasures of the Study; Ideal for Student Practice

$2.59

Fish Chunk Meat Tumbling Mixer Dried Meat Seasoning Mixer Red Oil King Oyster Mushroom Mixing Machine Yikang Machinery

Fish Chunk Meat Tumbling Mixer Dried Meat Seasoning Mixer Red Oil King Oyster Mushroom Mixing Machine Yikang Machinery

$17,419.00

Custom Company Door Plaques, Bronze Plates, Outdoor Stainless Steel Signs, Factory Display Boards, Metal Advertising Signs with Etched Customization

Custom Company Door Plaques, Bronze Plates, Outdoor Stainless Steel Signs, Factory Display Boards, Metal Advertising Signs with Etched Customization

$25.50

Blower Motor for BMW 5 Series, 6 Series, 7 Series, 8 Series, F90 M5, G Chassis

Blower Motor for BMW 5 Series, 6 Series, 7 Series, 8 Series, F90 M5, G Chassis

$480.00

Large Size Thickened Felt Mat for Calligraphy, Wool Felt Pad for Brush Practice, Traditional Chinese Painting Desk Mat

Large Size Thickened Felt Mat for Calligraphy, Wool Felt Pad for Brush Practice, Traditional Chinese Painting Desk Mat

$13.50

Creative Studio Sign Custom Door Plate Company Billboard LOGO Design Storefront Display

Creative Studio Sign Custom Door Plate Company Billboard LOGO Design Storefront Display

$119.00