On 25/02/2021 20:39, Clive Arthur wrote:
On 25/02/2021 18:28, Tim+ wrote:

I happened to stumble upon an old Hayter electric start lawnmower chucked
into the long grass by a road whilst out for a jog the other day so Ive
brought it home to see if its repairable or has any bits worth
salvaging.

I started stripping it down and all the bolts were regular metric sizes
until I came to remove the engine cooling cowling. 10mm socket too
big, 9mm
too small.

It did occur to me that they might not be the original bolts so I
tried all
the AF and Whitworth spanners that I have. No joy.

Eventually dug out a cheap 9mm open ender spanner that could be forced on
with a bit of percussive persuasion.

Im now inclined to think that they are original as they all match and my
micrometer measures them up at 9.5mm.Â* WTF is the point of that?? How
many
socket sets include a 9.5?

I cant believe that a designer decided that 9 mm would be too weak and
that a 10mm would be too cramped for space.

Tim


3/8" is 9.525mm

Ignore me. Been said.
--
C