Extruded Aluminum drop in T-Bolts and Hardware

[LXPlode]

Hi y'all - Been searching high and low and there are many chinesium products out there but i was wondering if anyone has a recommendation on quality hardware for Prinsu type roof racks. Trying to mount a storage box to my new Prospeed rack and I dont want to use crap hardware. Here are some examples from amazon:

Nuts - KOOTANS 100pcs 2020 Series M3 Thread T Nuts Hammer Head Fastener Nut Sliding T-Nut for 20 Series Aluminum Extrusion Profile T Slot 6mm: Amazon.com: Industrial & Scientific - https://amzn.to/3w8dUmX

Bolts - Amazon.com: Boeray Metric M5 x 25mm Thread T Slot Drop-in Bolt T-Bolt Hammer Head Bolt T Screw Stud for 2020 Series Standard 6mm T-Slot Aluminum Extrusion Profile Pack of 50: Home Improvement - https://amzn.to/3AehQpb

Thanks gang!