Originally Posted by
wahoonc
The SA spanner is
Whitworth, not metric. An inch equivalent is going to be either ?/32 or ?/64. I have a conversion table somewhere...
Aaron
It is close enough that a 16mm serves as a suitable replacement... the cones are hardened and the spanner will suffer before you damage the flats.
The small SA spanner is not very hard and we have gone through a few of them at the shop as they develop stress cracks.