The roof work used quarter-inch hardware at the rack and smaller M5 hardware in the extrusion. This flat-washer pack belongs to the quarter-inch side of my purchased fastening supplies.
I bought Hillman Quarter-Inch Flat Washers as part of my camper van equipment.
The roof work used quarter-inch hardware at the rack and smaller M5 hardware in the extrusion. This flat-washer pack belongs to the quarter-inch side of my purchased fastening supplies.
Comparing the Disk Around the Rack-Side Fastener
I used quarter-twenty bolts at the rack-side light-bar connection.
My recorded hardware stack included lock washers and flat washers there.
I mounted the light bar with quarter-twenty bolts and flat washers on the added beam.
The profiles and joint hardware during my roof-mount assembly.The drilled connectors and fasteners joining my added extrusion to the roof rack.
My Takeaway from This Job
The diary identifies flat washers in the light-bar assembly. My Hillman purchase, a wider Bates fender washer and the BCP USS format offer concrete disk and material differences to compare around the quarter-inch hardware.
The hole size and outside diameter describe different parts of a washer.
Product Details And Van-Build Uses
Specification
Product Detail
Fastener Size
1/4 inch
Profile
Continuous flat disk
Role
Contact surface around hole
The continuous disk provides a different physical shape from the split washers stored elsewhere in my kit. Record the outside diameter and thickness of the selected washer with the quarter-inch fastener identity. For a van panel or bracket, draw the washer as part of the full screw-and-nut stack so its footprint is visible near edges and neighboring hardware. That keeps the parts list useful when the connection is opened or compared with another joint.
It is a continuous flat disk rather than a ring with separated ends.
Alternative products
Two Alternatives to Compare
Bates fender washers provide a wider outer contact area. The BCP Fasteners alternative uses a quarter-inch USS flat-washer format in zinc-plated carbon steel.
These Bates washers combine a quarter-inch hole with a one-inch outside diameter. The broad disk provides a larger contact area than a smaller flat washer.
These BCP Fasteners quarter-inch USS flat washers are zinc-plated carbon steel. The package contains one hundred washers for placing beneath bolt heads or nuts.
