Dash Knob bezel thread size? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Xavier · 06-20-2020, 08:24 AM

Looking to add a knob to my cluster for my stereo install that will be the remote bass knob. Planning on custom fitting a potentiometer to look like a standard GM knob but I'm wondering if anyone has any idea what thread size the knob bezels use so I can get a panel mount pot that will mount directly with a bezel.

**LockDoc** · 06-20-2020, 12:32 PM

Quote:

Originally Posted by Xavier

Looking to add a knob to my cluster for my stereo install that will be the remote bass knob. Planning on custom fitting a potentiometer to look like a standard GM knob but I'm wondering if anyone has any idea what thread size the knob bezels use so I can get a panel mount pot that will mount directly with a bezel.

I'm not positive, and I don't remember ever seeing a thread size for them, but My best guess would be 1/2-24. I can't find my thread gauges but my 1/2 -20 thread chaser will start on the headlight fitting but stops after a couple of threads.

Just some thoughts.

LockDoc

**HO455** · 06-20-2020, 11:11 PM

I checked a wiper switch with pretty poor threads and came up with 28 threads per inch. Definitely not 27 or 32 threads per inch. Due to the damage to the threads I was only able to check against about 1/4" of threads.

Xavier · 06-20-2020, 11:20 PM

Thanks for checking, looks like I can't find any panel mount pots with 1/2" thread, the largest I can find is 3/8". Guess I'll have to nut & washer the bezel to get the look.

06-20-2020, 08:24 AM	#1
Xavier Registered User Join Date: Aug 2018 Location: Coatesville, PA Posts: 52	Dash Knob bezel thread size? Looking to add a knob to my cluster for my stereo install that will be the remote bass knob. Planning on custom fitting a potentiometer to look like a standard GM knob but I'm wondering if anyone has any idea what thread size the knob bezels use so I can get a panel mount pot that will mount directly with a bezel.

06-20-2020, 11:11 PM	#3
HO455 Post Whore Join Date: Feb 2016 Location: Portland Oregon Posts: 11,475	Re: Dash Knob bezel thread size? I checked a wiper switch with pretty poor threads and came up with 28 threads per inch. Definitely not 27 or 32 threads per inch. Due to the damage to the threads I was only able to check against about 1/4" of threads. __________________ Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help. RIP Bob Parks. 1967 Burban (the WMB),1988 S10 Blazer (the Stink10 II),1969 GTO (the Goat), 1970 Javelin, 1952 F2 Ford OHC six 4X4, 29 Model A, 72 Firebird (the DBP Bird). 85 Alfa Romeo If it breaks I didn't want it in the first place The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377

06-20-2020, 11:20 PM	#4
Xavier Registered User Join Date: Aug 2018 Location: Coatesville, PA Posts: 52	Re: Dash Knob bezel thread size? Thanks for checking, looks like I can't find any panel mount pots with 1/2" thread, the largest I can find is 3/8". Guess I'll have to nut & washer the bezel to get the look.



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