we and thou are fairly neutral so doahn blow a fuse ...

6mm bolts are maintenance bolts. 6mm are for sport touring n when yawl exceed sport touring or OEM gotta upgrade and replace.

experience here is hardware store ...the usual tray setup...6mm G5's for bottom rear rack into OEM (78 carbon steel Raleigh) are good for 1 yr/5000 miles only.

so whatever crazy **** you're into clearly exceeds OEM n the trays

https://www.mcmaster.com/#metric-hex...crews/=153yihj