Plastic end caps were among the accessories I bought for the 2020 aluminum framing.
The featured Amazon option is Rrina Slot Cover and End-Cap Kit.
Where it fits my build
For the light bar, I cut an added extrusion beam and made three short drilled connectors. The rack side used quarter-twenty hardware, while the smaller 2020 extrusion used M5 hardware.
The different nuts changed the assembly sequence. A rack nut had to slide in through an opening, which meant undoing bolts I had already tightened; the smaller nuts could move and spin while I tried to start a bolt. I used an Allen key to reposition them.
The drilled connectors and fasteners joining my added extrusion to the roof rack.The profiles and joint hardware during my roof-mount assembly.
My build notes
The cutting and drilling made the components, but positioning the small hardware took its own time. I recorded the difference between inserting the rack nuts and fishing the smaller nuts into place because it affected how the joint went together.
The profile, connector shape, bolt and slot nut all contributed to the assembly sequence.
Alternative products
Two alternatives to compare
The featured kit combines end caps with a slot-cover strip. The silver and black strip alternatives address the open longitudinal slots rather than the cut ends of the profile.
Silver Extrusion Slot Cover Strip
This silver strip covers an open slot in an aluminum profile. The flexible material can be divided into lengths along the frame.
