friction plates

1972 xs 650…. I torqued the clutch basket to 58 ft lbs and it’s tight but there is no threads after the nut which seems concerning? On top of that I cleaned off the old clutch plates/friction discs to re install and one broke, I figure I best replace them all, is there a kit that is superior...

I plan to replace my friction plates per my Service Manual. All of my friction plates are <3.1 mm as measured at 3 different locations per plate with a digital caliper. I have yet to check my steel clutch plates on a surface plate with a feeler gauge. I've seen suggestions (retired...