Grub screw for USA P bass volume knob?

[JJJack]

Anybody know where I can get one of the above? It's flat head not hex and would imagine it's imperial not metric.
Cheers
Jack

[JJJack]

Anyone?

[gary mac]

It might be simpler just to buy yourself a replacement knob.

Then nick the screw out of it, if you want to stick with the existing knob.

[JJJack]

That's an idea, but I don't know if the threads are metric or imperial. I thought there might be someone who knew these intricacies.

[KiOgon]

I've got some knobs don't have a thread guage but if the screw head is slotted I suspect they're imperial, if hex socket then metric.

It's not easy to get replacement screws - without the knob

[JJJack]

That's seems like a reasonable assumption to me. I will continue my quest, trying to get my 72 precision a bit more original after my mid 80s butchery (which I wish I hadn't done).

[pfretrock]

[quote name='JJJack' timestamp='1437062028' post='2823309']
That's an idea, but I don't know if the threads are metric or imperial. I thought there might be someone who knew these intricacies.
[/quote]
A bit of a guess..... Just removed some knobs from my MIM P. The screws have a 'US imperial' look about them - coarser than metric. Diameter is around 4mm and length a little over 4mm, with about 5 full turns of thread. So my guess is UNC 32 TPI. Metric screws have a finer thread (and are found on Squier)
the thread size looks identical to the bridge intonation screws used on Fender. Squier are metric.
If you buy knobs in the UK they will very likely be metric M4 set screws and may be slotted also.

[pfretrock]

8.32 UNC is my guess, but these may be a bit long at 1/4 inch

http://www.a2stainless.co.uk/8-32-0-164-diameter_B23SRV.aspx

[JJJack]

Thanks Pf, Much appreciated
That gives me a starting point. I'll see if I can find a local supplier.
Cheers
Jack

[pfretrock]

8.32 UNC x 3/16 might be worth looking at.

http://www.gwr-fasteners.co.uk/8-32-unc-socket-grub-screw---a2-stainless-37001-p.asp

[JJJack]

Cheers, I've made enquiries....
This is the reason for my question:
I think I'll replace the Badass with the original bridge and then it's about as original as it can be (ignoring the J pickup)
Cheers
Jack

[pfretrock]

I can confirm the screw in my Fender knob is 32 TPI - I borrowed a thread gauge at work. It may be the same or very similar to 5/32" BSW. The pitch is identical and the diameter very close. The reason I say this is 5/32" BSW is the thread used in Meccano sets, so if ever you have one or if hobby shops sell spares - worth a try! But the recessed hex types would be more reliable and less likley to come loose.

[JJJack]

I found out that Fender sell packs of 24 for £6.30. That's too many I reckon, more for the guitar repair workshop. But, luckily someone at Fender UK will send me one for nothing.
Thumbs up for Fender!
Jack

[iiipopes]

Great looking bass. I especially like, as on my custom P/J, that the V-V-T-Jack arrangement is all on the scratchplate instead of a jack being drilled in the side of the body.