@ philf.
I fixed one of the 6mm long bushes, inside a 3mm dia piece of brass. Fixed inside a newly minted jet block......
The flames were only 1/2" high...... 
Guess, it's the 6mm length, of the .12mm bore. But, they have plenty of larger sizes in stock! 
David.
Hi David,
PM me your address - I'll send you an assortment. I had a look at them yesterday and, as you said, to my surprise the hole runs right through. I managed to get a 0.12mm wire through one which came out of the 0.14 bore section of the box.
Unfortunately, when I first opened the box a lot of them fell out so they're mixed up. I think the small end is tapered to match a broach. If I remember correctly you broached out a pivot hole, pressed in the small end, and snapped it off leaving the small end in the watch or clock plate.
I'm only guessing they make them by a drawing process. I can't imagine drilling a 0.12mm hole through 6mm of brass.
I inherited these amongst a pile of junk a mate dumped on me whilst he was helping a lady clear her house prior to moving. Her late husband had been a clock repairer. (I am perhaps being a little unkind when I say a pile of junk because there was a lot of good stuff amongst the rubbish. There was some incomplete diamond drilling equipment which he used for making diamond wire drawing dies in a previous occupation. I'm afraid that, after removing any useful screws and useable small lumps of cast iron, they went to the tip. I kept some rough diamonds to use in dressing tools.)
Cheers.
Phil
