Murphy Grub screws - UK Vintage Radio Repair and Restoration Discussion Forum

mintras · 11th Jan 2013, 12:47 am

Now I have found that very excellent knobs can be cast, I have some great A124 knobs, which look and feel like the original, I need some grub screws, the diameter of the original is about 4.58mm but what is this in old money, and where can I get 20 or so?

What is the lingo I need to get them thread size etc?

Mike Phelan · 11th Jan 2013, 9:59 am

I think you'll find they are 4BA.
This might be useful.
There are quite a few suppliers who will get you what you want; Google for BA screws suppliers

11th Jan 2013, 10:39 am

As they are new knobs, why no go metric, available and cheaper (especially the taps). You can also use hex grub screws to advantage, i.e. you can screw/unscrew them easily.

Nymrod121 · 11th Jan 2013, 10:53 am

I've found this company to be very helpful:

A&M Fastener & Engineering Supplies Ltd
77 Heming Road
Redditch
Worcestershire
B98 0EA

01527 520770

Ask for Ryan or Martin.

ex 2 Base · 11th Jan 2013, 3:13 pm

You can obtain a range of BA and other screws, nuts and washers from EKP Barnstaple. Excellent service.

Ted

kalee20 · 11th Jan 2013, 5:53 pm

WOW! Thanks Ted - I pass by every working day within 100 yards and never even knew they existed! They are in Bratton Fleming which is a small village at the head of a valley - exactly the sort of place I'd want to support.

Thanks again!

11th Jan 2013, 12:47 am	#1
mintras Retired Dormant Member Join Date: Jun 2012 Location: Manchester, UK. Posts: 40	Murphy Grub screws Now I have found that very excellent knobs can be cast, I have some great A124 knobs, which look and feel like the original, I need some grub screws, the diameter of the original is about 4.58mm but what is this in old money, and where can I get 20 or so? What is the lingo I need to get them thread size etc? Last edited by Mike Phelan; 11th Jan 2013 at 9:56 am. Reason: Made it a question.

11th Jan 2013, 9:59 am	#2
Mike Phelan Dekatron Join Date: Nov 2003 Location: Near Leeds, West Yorkshire, UK Posts: 4,609	Re: Murphy Grub screws I think you'll find they are 4BA. This might be useful. There are quite a few suppliers who will get you what you want; Google for BA screws suppliers __________________ Mike.

11th Jan 2013, 10:39 am	#3
Guest Guest Posts: n/a	Re: Murphy Grub screws As they are new knobs, why no go metric, available and cheaper (especially the taps). You can also use hex grub screws to advantage, i.e. you can screw/unscrew them easily.

11th Jan 2013, 10:53 am	#4
Nymrod121 Nonode Join Date: Apr 2012 Location: Worcestershire, UK. Posts: 2,052	Re: Murphy Grub screws I've found this company to be very helpful: A&M Fastener & Engineering Supplies Ltd 77 Heming Road Redditch Worcestershire B98 0EA 01527 520770 Ask for Ryan or Martin.

11th Jan 2013, 3:13 pm	#5
ex 2 Base Heptode Join Date: Nov 2009 Location: Scarborough, North Yorkshire, UK. Posts: 510	Re: Murphy Grub screws You can obtain a range of BA and other screws, nuts and washers from EKP Barnstaple. Excellent service. Ted

11th Jan 2013, 5:53 pm	#6
kalee20 Dekatron Join Date: Feb 2007 Location: Lynton, N. Devon, UK. Posts: 7,081	Re: Murphy Grub screws WOW! Thanks Ted - I pass by every working day within 100 yards and never even knew they existed! They are in Bratton Fleming which is a small village at the head of a valley - exactly the sort of place I'd want to support. Thanks again!