Re: Need the name of the thick domed washers used on keyboard / bellows strap
Jim,
They're called finishing washers. Available at Lowe's, Ace Hardware, or anyplace that is supplied by the Hillman Group. See link #1 for Lowes #8 brass.
Re: Need the name of the thick domed washers used on keyboard / bellows strap
Ned, not the same as finishing washers. The ones Jim is talking about are bigger. I've only seen them from accordion parts suppliers, and only in silver.