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.

Post Onsite · Hardware & Fasteners
20520
In stock · ships from Knoxville
This is a 3-inch steel blind flange, a flat metal plate used to seal the end of a flanged pipe or fitting.
Confirm the part fits before you buy. Applications and interchange numbers are researched and audited per part.
We don't publish fitment for this part yet. Rather than guess, get it confirmed against your truck in under a minute.
It bolts to a matching companion flange and is commonly found on tank trailers, chemical trailers, and heavy-duty truck piping systems to cap off unused ports or during maintenance. The 8-hole pattern is typical for certain trailer flange standards, making it a direct replacement for many tanker applications. It is made from steel with a thickness of 0.14 inches (10 gauge), offering a durable, lightweight closure.
Part Number: 20520
BLIND FLANGE 3 8 HOLE
Unit: ea
Dealer: Post Onsite
Compatibility, alternatives, and more