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

[Dr. David Kirkby]

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.
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Tel 01621-680100 / +44 1621-680100