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.

Caterpillar · Hardware & Fasteners
1808424
In stock · ships from Knoxville
This is a genuine Caterpillar O-ring seal made of EPDM rubber with a low-friction PTFE coating.
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.
Caterpillar
Caterpillar
Commonly used in cooling system joints; exact fitment depends on engine model and component location. May also be found in turbocharger mounting applications on certain Caterpillar engines; verify against the engine parts manual.
Part data verified against 5 catalog sources
Different year, make, or config? Get a confirmation against your truck in under a minute.
It has an inside diameter of 12.42 mm (0.489 in) and a 1.78 mm (0.07 in) cross-section, designed to seal fluid connections in cooling systems. The EPDM material handles engine coolant, water, and diesel exhaust fluid, and withstands temperatures from -67°F to 275°F, but it is not compatible with fuel or oil. It is typically replaced when servicing cooling components on Caterpillar engines, especially those with ebullient cooling systems.
Part Number: 1808424
O-RING
Vendor: STOWERS MACHINERY
Dealer: KP Services Crossville
Compatibility, alternatives, and more