What size hex nut for Rumble 500 input jack?

[DCGuy]

Hi there,
My Rumble 500 head came back from last Sunday's gig without the little retaining nut on the input jack. Want to order a replacement but I don't know the size. I see 3/8"/32 thread is available, as is 7/16-20 X 1/8 and others. So, I'm pretty confused. Thanks for any help as to what to order.
Rob

 

[BassmanPaul]

Contact Fender support. Like as not they’ll send you one free of charge.

 

[Ross W. Lovell]

Hi there,
My Rumble 500 head came back from last Sunday's gig without the little retaining nut on the input jack. Want to order a replacement but I don't know the size. I see 3/8"/32 thread is available, as is 7/16-20 X 1/8 and others. So, I'm pretty confused. Thanks for any help as to what to order.
Rob

Its not the size of the nut........its the pitch of the threads, metric or SAE.

 

[agedhorse]

There are 4 or 5 sizes and thread pitches used. Give Fender a call, or go to a repair shop and buy the guy a cup of coffee and I'm sure they will fix you up.

 

[DCGuy]

Interesting that there are so many. I will contact fender. Thanks
R

 

[agedhorse]

Interesting that there are so many. I will contact fender. Thanks
R

It's not just interesting, it's kind of a pain in the butt when stocking parts and trying to get the right parts to the customer. That's why pro service shops keep a stash of such parts.

 

[abarson]

You can't get them at the hardware store either.

 

[agedhorse]

They are a mix of standard and metric, all over the may size and pitch.

 

[Jim Carr]

I recently had this "amp missing input jack nut" problem. Mesa was able to provide the part, which in my case was a surface mount
(printed circuit board) type jack.

Andy is right, there are quite a few difference thread types in use.
Contact Fender, they will be able to send you the correct part for a small charge.

 

[agedhorse]

Surface mount?

 

[Jim Carr]

Surface mount?

Yes. The jack mounts to a printed circuit board with 4 tabs, and screws to the front panel with the illusive nut.

Maybe it's really "through-hole technology" not "surface mount." I think it mounts to the PCB with 4 tabs that appear to expect holes and probably tracks.

About 41 years ago, my job was to build scanning electron microscopes, and I built a lot of large PC boards and assorted electron microscopy components for Advanced Metals Research Corp. Saved money for grad school while also gigging my tail off in Cambridge, Quincy, Gloucester, Boston, etc.

Jack - 4 Tab PC Mount

Here's a pic:

 

[agedhorse]

Yes. The jack mounts to a printed circuit board with 4 tabs, and screws to the front panel with the illusive nut.

Jack - 4 Tab PC Mount

Here's a pic:

View attachment 3694542

That's not a surface mount part, it's a standard through-hole jack, a part that happens to be sitting on my desk too!

 

[Jim Carr]

That's not a surface mount part, it's a standard through-hole jack, a part that happens to be sitting on my desk too!

Haha. Well, it's only been 41 years since I built a circuit card, lol!

 

[agedhorse]

Haha. Well, it's only been 41 years since I built a circuit card, lol!

What are you waiting for, you better warm up the soldering iron and get to work.