Allen Key size

Allen Key size

This topic has 9 replies, 7 voices, and was last updated 19 March 2013 at 19:10 by JasonB.

Viewing 10 posts - 1 through 10 (of 10 total)

Author

Posts
19 March 2013 at 14:51 #114752
Tony Martyr
Participant
@tonymartyr14488
I thought I had every allen-key known to man under 1/2" but I am currently defeated by one for tightening a set of 6BA grub-screws.

Can anyone help with the size? I am assuming they would be an imperial size but my sets don't seem to include the correct one.

Tony
Advert

19 March 2013 at 14:51 #22529
Tony Martyr
Participant
@tonymartyr14488
19 March 2013 at 15:04 #114754
JasonB
Moderator
@jasonb
0.050"

J
19 March 2013 at 18:43 #114768
Andyf
Participant
@andyf
I think 1.25mm is the smallest common metric Allen key, and would probably substitute for 0.05". 1.25mm = 0.0492", so less than 1 thou undersize.

Andy.

Edited By Andyf on 19/03/2013 18:44:36
19 March 2013 at 18:45 #114769
David Littlewood
Participant
@davidlittlewood51847
If you have trouble finding one, you can get them (at a price!) from Slater's Plastikard; they are the standard size for fixing Slater's wheels on to O gauge locos.

**LINK**

I'm sure you could find them cheaper somewhere else though.

David
19 March 2013 at 18:51 #114770
Michael Cox 1
Participant
@michaelcox1
Model Fixings (http://www.modelfixings.co.uk) stock 0.05" hex keys.

Mike
19 March 2013 at 18:52 #114771
JasonB
Moderator
@jasonb
Can't see why you would want to buy a metric substitute taht won't fit so well when 50thou keys are readily available

Try EKP, MSC, GS Supplies, Reeves, Bruce, Model Fixings etc

J&L/MSC are probably the cheapest with decent Eklind ones costing 9p
19 March 2013 at 18:55 #114772
Ian Abbott
Participant
@ianabbott31222
Grind a larger one down to size

Ian
19 March 2013 at 18:59 #114773
Anonymous
There's nothing to say that the 6BA grub screws have a standard size hex hole, depending upon their provenance.

Regards,

Andrew
19 March 2013 at 19:10 #114774
JasonB
Moderator
@jasonb
Well I suppose we have to assume they are made to BS 2470 just as we would have to assume all other fixings are to the relevant british standard.
Author

Posts

Viewing 10 posts - 1 through 10 (of 10 total)

Please log in to reply to this topic. Registering is free and easy using the links on the menu at the top of this page.

Code of Conduct

Latest Replies

Viewing 25 topics - 1 through 25 (of 25 total)

- Topic
- Voices
- Posts
- Last Post
- Chuck backplates
  Started by: Kiwi Bloke in: Materials
- 11
- 14
- 6 September 2026 at 07:19
  Alan Charleston
- “Wanted” Big Boy 4884 3.5 True to Scale Services
  Started by: corbin371 in: Help and Assistance! (Offered or Wanted)
- 3
- 3
- 6 September 2026 at 07:12
  JasonB
- New member
  Started by: corbin371 in: Introduce Yourself – New members start here!
- 1
- 1
- 6 September 2026 at 01:05
  corbin371
- Inserting An Angled Feature (Alibre Atom)
  Started by: Nigel Graham 2 in: CAD – Technical drawing & design
- 3
- 10
- 5 September 2026 at 22:38
  Nigel Graham 2
- spark eroder
  Started by: martin haysom in: General Questions
- 4
- 5
- 5 September 2026 at 22:31
  Bazyle
- Annular burner design
  Started by: Mark Smith 3 in: Beginners questions
- 6
- 15
- 5 September 2026 at 21:49
  Mark Smith 3
- New Milling Machine with a DRO problem
  Started by: Keith Fitch in: General Questions
- 2
- 2
- 5 September 2026 at 21:11
  bernard towers
- Over Engineered Pencil Sharpener
  Started by: Clive Foster in: The Tea Room
- 13
- 18
- 5 September 2026 at 20:26
  Mark Rand
- How much !?!
  Started by: Michael Gilligan in: Workshop Tools and Tooling
- 13
- 21
- 5 September 2026 at 19:24
  Michael Gilligan
- 1904 Whitehead Vertical Gas Engine
  Started by: JasonB in: I/C Engines
- 4
- 10
- 5 September 2026 at 19:14
  JasonB
- Chuck disassembly
  Started by: AJW in: Workshop Tools and Tooling
- 4
- 5
- 5 September 2026 at 18:26
  old mart
- Reaming drill sizs 1 2
  Started by: Steve Huckins in: Beginners questions
- 22
- 44
- 5 September 2026 at 18:18
  old mart
- Albrecht Chucks
  Started by: Michael Gilligan in: Workshop Tools and Tooling
- 2
- 3
- 5 September 2026 at 17:51
  old mart
- My week this week! My workshop videos 1 2 … 13 14
  Started by: Phil Whitley in: The Tea Room
- 16
- 330
- 5 September 2026 at 11:55
  Phil Whitley
- Reverting A Section To Full View? (Alibre Atom)
  Started by: Nigel Graham 2 in: CAD – Technical drawing & design
- 4
- 6
- 4 September 2026 at 21:46
  Nigel Graham 2
- Long screwdriver, I know that it usually works but why? 1 2
  Started by: File Handle in: The Tea Room
- 23
- 33
- 4 September 2026 at 20:03
  Phil super7
- MS-272-100 Digital Linear Scale direction of reading
  Started by: Peter Cook 6 in: Workshop Tools and Tooling
- 7
- 15
- 4 September 2026 at 18:32
  Peter Cook 6
- Emma Victoria boiler end of the road 1 2
  Started by: Bill Dawes in: Locomotives
- 10
- 39
- 4 September 2026 at 13:39
  Bill Dawes
- What Did You Do Today 2026 1 2 … 6 7
  Started by: JasonB in: The Tea Room
- 46
- 175
- 4 September 2026 at 11:40
  Dalboy
- How long?
  Started by: Adrian 2 in: The Tea Room
- 14
- 23
- 4 September 2026 at 11:29
  Baz
- Rob Roy Build
  Started by: Dalboy in: Locomotives
- 5
- 19
- 4 September 2026 at 11:28
  Dalboy
- Working at a different scale
  Started by: Adrian R2 in: The Tea Room
- 3
- 4
- 4 September 2026 at 08:26
  Howard Lewis
- Steam Traction World in administration
  Started by: Baldric in: The Tea Room
- 13
- 20
- 4 September 2026 at 07:14
  deano155
- Emco Compact 5 milling table restoration
  Started by: rikt in: Manual machine tools
- 6
- 15
- 4 September 2026 at 03:38
  Pete
- New motor for a Myford super 7 1 2
  Started by: Hollowpoint in: Electronics in the Workshop
- 19
- 27
- 3 September 2026 at 23:54
  Brian Lee

Viewing 25 topics - 1 through 25 (of 25 total)

View full reply list.

Latest Issue

September 2026

Buy Latest/Back Issues

Newsletter Sign-up

Latest Replies