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.

Allegheny Valve & Coupling · Hardware & Fasteners
20056A
In stock · ships from Knoxville
This is a 3-inch mild steel TTMA flued flange, typically used on chemical or petroleum tank trailers to connect pipes or hoses.
Confirm the part fits before you buy. Applications and interchange numbers are researched and audited per part.
Verified fitment for 2 applications
Add your truck to see whether it's one of them
All confirmed applications for this part number.
Other applications
Other applications
Fits 3” schedule 40 pipe; welds onto the pipe end. Designed for TTMA flued flange connections common on DOT 407/412 chemical trailers.
Part data verified against 5 catalog sources
Different year, make, or config? Get a confirmation against your truck in under a minute.
Its flued (grooved) face accommodates a gasket for a tight seal, and the flange is designed to be welded onto schedule 40 pipe. These flanges are replaced when corroded, damaged, or when building or repairing a trailer’s piping system.
Part Number: 20056A
FLANGE 3 M/S
Unit: ea
Dealer: Post Onsite
Compatibility, alternatives, and more