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Size of hex (?) screw in knobs of 5370B time-interval counter

Dr. David Kirkby from Kirkby Microwave Ltd
 

I have a few HP 5370B time-interval counters of various states of cosmetic and electrical condition. I wish to swap some knobs between the instruments, as some are in better condition than others. Can anyone tell me what size of hex key these are? I wish to order a hex key, but obviously, want one the correct size.

Dave, G8WRB.?

--
Dr David Kirkby Ph.D C.Eng MIET
Kirkby Microwave Ltd
Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, CHELMSFORD, Essex, CM3 6DT, United Kingdom.
Registered in England and Wales as company number 08914892

Tel 01621-680100 / +44 1621-680100
 

0.050 inches.

Get a good brand, you want it to fit tightly.

-Chuck Harris

Dr. David Kirkby from Kirkby Microwave Ltd wrote:

I have a few HP 5370B time-interval counters of various states of cosmetic
and electrical condition. I wish to swap some knobs between the
instruments, as some are in better condition than others. Can anyone tell
me what size of hex key these are? I wish to order a hex key, but
obviously, want one the correct size.

Dave, G8WRB.
 

Dave,?
Go for Wiha 353.92 (metric) and 353.93 (imperial) set. Its for the life investment.
Milan

On Fri, 16 Nov 2018, 15:39 Chuck Harris <cfharris@... wrote:
0.050 inches.

Get a good brand, you want it to fit tightly.

-Chuck Harris

Dr. David Kirkby from Kirkby Microwave Ltd wrote:
> I have a few HP 5370B time-interval counters of various states of cosmetic
> and electrical condition. I wish to swap some knobs between the
> instruments, as some are in better condition than others. Can anyone tell
> me what size of hex key these are? I wish to order a hex key, but
> obviously, want one the correct size.
>
> Dave, G8WRB.
>



Dr. David Kirkby from Kirkby Microwave Ltd
 

On Fri, 16 Nov 2018 at 16:23, Milan Vasic <vasa1958@...> wrote:
Dave,?
Go for Wiha 353.92 (metric) and 353.93 (imperial) set. Its for the life investment.
Milan

No way - I will lose them before I die. Or at least I hope that's the case, since otherwise I would have a pretty short lifetime!

I had a feeling they might be 0.05", as they looked the same as the hex key in my 85054B VNA cal kit for the sliding load. the trouble is I have lost that hex key! I just ordered a set, plus a few extra 0.05", as it seems a common size, and I know I lose the binking things. I'll try to keep one in the cal kit.


Dr David Kirkby Ph.D C.Eng MIET
Kirkby Microwave Ltd
Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, CHELMSFORD, Essex, CM3 6DT, United Kingdom.
Registered in England and Wales as company number 08914892

Tel 01621-680100 / +44 1621-680100

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