Your cart is empty
Browse our catalog to find the parts you need.
These images are illustrative and may not match the product exactly. Always verify by part number — or confirm instantly with the assistant using a photo or VIN.
Knox Trailers · Hardware & Fasteners
9/16FW
In stock · ships from Knoxville
This is a standard 9/16-inch flat washer, a round, thin plate with a hole in the center used to distribute the load of a threaded fastener like a bolt.
Confirm the part fits before you buy. Applications and interchange numbers are researched and audited per part.
Verified fitment for 1 applications
Add your truck to see whether it's one of them
All confirmed applications for this part number.
Universal fit
A 9/16-inch flat washer is a universal hardware component, not specific to any vehicle make or model. It is used with a 9/16-inch diameter bolt. While used extensively across all heavy-duty truck and trailer repairs and assembly, it is not a part that can be linked solely to specific OEM applications.
Part data verified against 5 catalog sources
Different year, make, or config? Get a confirmation against your truck in under a minute.
It is placed under the bolt head or nut to prevent the fastener from pulling through the material and to provide a smooth bearing surface for controlled tightening. You replace washers whenever they are removed during a repair where they've become deformed, rusted, or lost, ensuring the new fastener assembly achieves proper clamping force.
Part Number: 9/16FW
FLAT WASHER
Unit: ea
Dealer: Knox Trailers
Compatibility, alternatives, and more
