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.

Emco Wheaton · Hardware & Fasteners
298541
In stock · ships from Knoxville
This is a 1-inch diameter push button assembly for an air interlock valve, typically found on fuel delivery tank trucks and trailers.
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.
Other applications
Other applications
Designed to fit Emco Wheaton interlock valve models such as those sold under part numbers 803010201, F0567501, and LIQCV300. Verify your valve accepts a 1-inch diameter button before ordering.
Part data verified against 1 catalog sources
Different year, make, or config? Get a confirmation against your truck in under a minute.
It serves as the manual interface that engages or disengages the pneumatic interlock system, preventing the vehicle from being moved while the loading or unloading equipment is still connected. The button is a wear item; the rubber or plastic surface can crack, tear, or degrade over time, leading to air leaks or failure to actuate the interlock. Replacing the button restores safe operation of the interlock valve.
Part Number: 298541
INTERLOCK BUTTON
Unit: ea
Dealer: Post Onsite
Compatibility, alternatives, and more