I had such a hard time getting the alum or copper style crush washers to seal I was afraid the threads in the Alum MC were going to strip so I recently found: https://www.amazon.com/KiWAV-Washer...4ea57da2c5bd31730&qid=1739646217&sr=8-15&th=1 Opinion?
Those are the neatest thing since the invention of the (fill in the blank)! I'll have to get a couple of them for the aluminum Corvette M/C in my Nova.
I've always called them Stat-o-seals. I've used them many times on the scooters. I have a set on the front calipers on my heap. They have always worked great for me.
I tried to anneal but still had to use high torque. I remember serrations. https://www.ebay.com/itm/2767376789...5pYthJ1hxaGO650xuBzsOvUQ==|tkp:Bk9SR5rTgcChZQ
That would be Earls and unless something has changed in design/mfg, these are high quality, same as the Earls line of AN type fittings.