Thanks, yes low-head is the correct technical term! Got mine from Speedy Fasteners. They also stock spacer collars for the bolts that prevent over-tightening and potentially splitting the fairing.
don't know about technical but best use the same language as the masses obviously, we called them 'reduced height' years ago so probably too many words.
Apart from OEM bolts has anyone come across steel bolts zinc plate yellow passivate which is what I believe most originals are. I have searched ebay and the net without much success. There are plenty of zinc plate clear which leaves them looking silver but I want the original look (I know). There are local platers but but wondered about de-embrittlement second time around and re using bolt on important areas such as discs and breaks. Cheers Gaz
This is my bolt list (i have added the engine bolt list from sim900sl, as I don't have all these to hand to measure) it might be of help to someone https://dl.dropboxusercontent.com/u/6323071/1991 900ss fasteners list.csv
Not sure if you found a source of these... Ducati John can get them plated with the yellow passivate. I havnt decided what to do myself yet. Probably buying new and getting some re-plated.