The rack-side connections in my light-bar build used quarter-twenty hardware. I had to reopen an already tightened section when I needed to insert another slide-in nut.
The drilled connectors and fasteners joining my added extrusion to the roof rack.
Why I bought it
80/20 3479 Bolt and Slide-In Nut Assemblies appears in my build materials and equipment for this work.
The rack-side connections in my light-bar build used quarter-twenty hardware. I had to reopen an already tightened section when I needed to insert another slide-in nut.
How I used it in my camper van
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 profiles and joint hardware during my roof-mount assembly.
My review
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 3204 provides slide-in nuts separately, while the 3923 changes to a roll-in nut format. Both are component alternatives to the bundled bolt-and-nut assembly, with insertion method affecting the assembly sequence.
80/20 3204 Slide-In T-Nuts
These quarter-twenty steel nuts use a slide-in profile for 10-series extrusion. Their threaded openings provide attachment points inside the slot.
These quarter-twenty steel T-nuts use a roll-in profile with a ball spring. Their rounded shape provides another insertion arrangement for 10-series extrusion slots.
