Knob - Set Screw, Marshall Style, black base

Knob - Set Screw, Marshall Style, black base

Knob - Set Screw, Marshall Style, black base image 1
Pictured: Black
Pictured: Black
Pictured: Gold
Pictured: Gold
Pictured: Silver
Pictured: Silver
Customer image:<br/>""
Click to zoom in
Knob - Set Screw, Marshall Style, black base image 1Pictured: BlackPictured: GoldPictured: Silver
Customer Images:
Customer image: ""
In Stock

High quality Marshall style knobs with set screws. These knobs are available with the classic gold and silver top caps as well as an all black version. These knobs use a slotted set screw and fit ¼ in. (6.35mm) pot shafts. 0.77" diameter x 0.62" tall.

Item ID:
Marshall Style
Replacement Type:
Part Numbers
Cap ColorOur Part NumberUPC/EAN
Product Measurements by Type
Body Height12.3 mm
Interior Diameter6.4 mm
Item Height15.3 mm
Top Diameter15.35 mm
Packaging Information
Packaging DimensionsBlack versionP-K393B0.75 in. × 0.75 in. × 0.623 in.
Gold versionP-K3930.771 in. × 0.771 in. × 0.617 in.
Silver versionP-K3920.771 in. × 0.771 in. × 0.617 in.
Weight (Packaging)0.011 lbs.
Product Measurements by Item
P-K392 - Silver versionBody Height12.3 mm
Interior Diameter6.4 mm
Item Height15.3 mm
Top Diameter15.35 mm
P-K393 - Gold versionBody Height12.3 mm
Interior Diameter6.4 mm
Item Height15.3 mm
Top Diameter15.35 mm
P-K393B - Black versionBody Height12.3 mm
Interior Diameter6.4 mm
Item Height15.3 mm
Top Diameter15.35 mm

My Project Lists

You must be logged in to add items to a project list.

Questions and Answers

Click each question to see its answers.
Asked by Anonymous on December 17th, 2015.
February 24th, 2016
Staff Member
Top Contributor
This is designed for use with a 1/4" shaft and uses a set screw.
Asked by Anonymous on March 2nd, 2019.
March 5th, 2019
Staff Member
These will fit on any 1/4" solid shaft potentiometers.

Product Reviews

4.44 out of 5 based on 9 reviews - May 23rd, 2022
5 out of 5

This review is for the black and gold knobs. I had issues with the silver ones read my other review. These knobs are of decent quality and came unblemished. However, multiple items were missing their set screws. It was a hassle to have to deal with getting replacement set screws but, more importantly I was on a time crunch with a client. I didn’t have time for several of the knobs to not be able to be fastened to the amplifier I had just modded. More hassle than it’s worth. Void all of that, and a slight scuffle with customer service regarding the damaged silver ones and missing several missing set screws they seem to be a good product if you get lucky and everything arrives with all its parts and unscathed. If you’re on a timeline or providing product for a customer and relying on purchasing quality parts with good quality control and unparalleled customer support you might need to look elsewhere? I will certainly give them another try with my business but if I continue to get poor quality control and feel “challenged” about my faulty items, I may need to go elsewhere too? - May 23rd, 2022
2 out of 5

BUYER BEWARE: This review is for the silver Marshall style knobs (I also ordered gold and black which came with no issues except two of them were missing set screws). Apparently the silver knobs scratch easily. I build and sell modded amplifiers & pedals. My silver knobs arrived scratched and “B stock” at best. I cannot put my name on product that is scratched and damaged which is sold to me as new. When brought up with Wesley in customer service he said it’s just the way they are. I don’t know about you but when I buy a new product I expect it to be new not scratched up & damaged. When I asked if they could possibly look for some that weren’t scratched they told me “NO” that they’re all that way. So, I guess it’s buyer beware on the silver ones. He did note that the Marshall branded version has higher quality control and recommend that option. Worthy of note.

Kelly Roberts - March 18th, 2022
3 out of 5

Love the 4 knobs. My only issue was two of them were missing the set screw.. ace hardware has replacement so it wasn’t a big deal. I would like two more though, please mail me back so I can order them.

Mike Pfaff - November 18th, 2021
5 out of 5

Very nice replacement knobs; better than I expected

Sinisa Petrovic - September 1st, 2021
5 out of 5

Perfect knobs, excellent design and make. They also look awesome!

mAx___ - April 10th, 2021
5 out of 5

Great looking and good quality knobs. I'd wish they'd be direct replacements for the vintage ones I have in my 1970 Marshall though!

Tod wildason - May 10th, 2020
5 out of 5

Great product. Has the brass insert which makes for a great tight fit with no knob distortion.

rednoise - January 14th, 2019
5 out of 5

I was looking for replacements for a JCM 5xxx series (75 Reverb). I'm very happy that these have a metal shaft so they won't split like the originals do! They fit perfectly, are the same depth and width, and from a distance are a very close match. The color of these is black whereas my originals are a dark brown, and the ridge pattern around the side is a little different. The indicator line is just a hair smaller, but from 12" away they look the same - even the color is certainly "close enough".

J Tieszen - February 25th, 2015
5 out of 5

These knobs look perfect, and I love that I can buy them individually so I can get exactly the number I need!