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.
Post Onsite · Hardware & Fasteners
SGA301
In stock · ships from Knoxville
This is a square flange gasket designed for 3-inch TTMA (Truck Trailer Manufacturers Association) flanges commonly found on dry bulk pneumatic trailers.
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
This part number covers the standard 3-inch TTMA square gasket used by many dry bulk trailer manufacturers (e.g., Heil, Polar, Brenner). The material is not specified; verify with the supplier if a specific compound (silicone, Buna, non-asbestos) is required for your application.
Part data verified against 5 catalog sources
Numbers this part supersedes or interchanges with. Showing 6 of 6.
Different year, make, or config? Get a confirmation against your truck in under a minute.
It seals between flanged connections – such as check valves, sumps, and piping – to prevent powder leaks during loading and unloading. Over time, gaskets can harden, crack, or take a compression set, causing leaks that disrupt operation; replacement restores a tight seal. The gasket is available in materials like silicone, Buna, and non-asbestos, but the specific material for this inventory item is not identified.
Part Number: SGA301
GASKET SQUARE (CHECK VALVE)
Unit: ea
Dealer: Post Onsite
Compatibility, alternatives, and more
