have no idea what they are from, most likely Yamaha but could be
Suzuki. Manufacturer doesn't matter, just similar specifications -
need for a project and these are from a coffee can of accumulated
motorbike bits and bobs I had on hand.
Grommet is approximately 18mm across.
Sleeved washer is approximately 14mm across, 8mm deep (length that
goes through grommet), and would fit a M6 bolt or so.
Post a comment if you have ideas. I just need direction like 'try a
side panel from a 1982 Seca 550 J' and I'll try to cross reference
your direction to a microfiche.