Originally Posted by
mapleleafs-13
1) 7/32 ?
Vintage Campagnolo "Record" front hubs, Zeus 2000 titanium bottom brackets.
2) 5/32 ? (headset bearing?)
Many pedals, some headsets (e.g. Campagnolo Record track and Gran Sport road, many Japanese and French headsets), Helicomatic rear hubs.
Freewheels. Some pedals.
3/16: many front hubs, including Campagnolo Tipo, Triomphe, Victory. Vintage Campagnolo Super Record titanium bottom brackets and C-Record bottom brackets. Also some obscure 1960s Campagnolo Record bottom brackets marked "CON SFERE DA 3/16" Some high-end headsets like Campagnolo Record and Super Record, Shimano Dura-Ace and 600, etc.