My roof diary distinguishes quarter-inch rack hardware from M5 extrusion fasteners. This washer purchase belongs to the inch-size side of that workshop selection.
The drilled connectors and fasteners joining my added extrusion to the roof rack.
The item in my kit
I bought Hillman Quarter-Inch Stainless Split Washers as part of my camper van equipment.
My roof diary distinguishes quarter-inch rack hardware from M5 extrusion fasteners. This washer purchase belongs to the inch-size side of that workshop selection.
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 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
Cionyce and IMScrews offer other quarter-inch split-washer packs. Each retains the same general ring form while changing the supplier and package.
Cionyce Quarter-Inch Split Washers
These stainless-steel washers use a split-ring shape with offset ends. Their quarter-inch size provides a washer format for threaded hardware assemblies.
