Imperial sized grub screws

[robiredale]

Content does not get more exciting than this.

 

I have a couple of rounded grub screws on a Dingwall NG2 bass that require replacement.

 

They are imperial sized I think, and this is a problem for me, as I'm utterly clueless about the system. I've measured the screw as half an inch long and 0.13 inches wide. 

 

Does anyone have an idea of where I might be able to source the screws I need?

[rwillett]

Try googling
 

"imperial grub screw 1/8 uk"

 

A number of UK companies pop up. The problem now maybe whats the thread on the grub screw. That could be tricky to find out. 

 

Why imperial measurements haven't died out is beyond me. As an exercise for the reader, what sized screw fitting is on almost every camera ever made, including Russian and Japanese?

 

Rob
 

 

[Stub Mandrel]

EKP Supplies.

 

If they don't stock what you need, they will make it.

[Hellzero]

Amazon provides a lot of these grub screws in imperial and metric measurements.

 

That said the inch is an imperial measurement. 😉

 

Here is a link to a conversion table using the American UNC thread measurements: https://www.trfastenings.com/knowledge-base/thread-geometries/thread-conversion-table

 

According to this table you need a #6-32 thread, which is the usual suspect for these screws.

[Hellzero]

Here are some: https://www.accu.co.uk/imperial-cup-point-setgrub-screws/166962-SSU-6-32-1-8-A4-BL

[robiredale]

thanks all for the replies! super helpful. 

 

@Hellzero - thanks so much for this! The Accu link you provided is great - apart from it states that they will not ship for 41 days, which is a bit longer than I'd like to wait.

 

are these the correct ones also? Link

[baldwinbass]

5 minutes ago, robiredale said:

The Accu link you provided is great

I've used them several times, and specifically for imperial threads. Can reccommend!

[Hellzero]

2 hours ago, robiredale said:

thanks all for the replies! super helpful. 

 

@Hellzero - thanks so much for this! The Accu link you provided is great - apart from it states that they will not ship for 41 days, which is a bit longer than I'd like to wait.

 

are these the correct ones also? Link

Do you need more than 181 screws?!?

[robiredale]

no, but the ones i need are 1/2 long. when i select that, it says despatched in 41 days.

 

although they have stainless ones in stock (rather than marine grade stainless). so i'll give them a go!

 

cheers

[Stub Mandrel]

4 hours ago, robiredale said:

no, but the ones i need are 1/2 long. when i select that, it says despatched in 41 days.

 

although they have stainless ones in stock (rather than marine grade stainless). so i'll give them a go!

 

cheers

 

ACCU can be bonkers expensive with their MOQs. Try EKP, my last order came in 48 hours.

[PaulThePlug]

I use Spaldings Fastners A2 Stainless, Plus you can get them in different lengths 4+ 4 instead of having em poking out the saddle

1/2" 10 pack - £5

https://www.spaldingfasteners.co.uk/PARENT1875

Edited Monday at 19:02 by PaulThePlug

[Stub Mandrel]

23 hours ago, rwillett said:

As an exercise for the reader, what sized screw fitting is on almost every camera ever made, including Russian and Japanese?

 

Mostly 1/4" BSW, but some are 14/20 UNC.

 

A 14/20 UNC thread, commonly used on tripods etc. will fit 1/4 BSW but not the other way round (if made to tolerance).

[rwillett]

1 minute ago, Stub Mandrel said:

 

Mostly 1/4" BSW, but some are 14/20 UNC.

 

A 14/20 UNC thread, commonly used on tripods etc. will fit 1/4 BSW but not the other way round (if made to tolerance).

The man wins a cigar...

[robiredale]

thanks again to everyone who's offered help and advice.

 

i am slightly saddened that my thread about grub screws has generated more interest than some threads about my band, but there you go 😆

 

cheers!

[rwillett]

But on the plus side, you now know more about Imperial grub screws than you ever did before.

Edited Tuesday at 08:11 by rwillett