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.

LittleJohn Inc. · Hardware & Fasteners
20766
In stock · ships from Knoxville
This is a replacement O-ring that fits into the cap of a Scully probe holder.
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.
Probe holders are part of the overfill prevention system on tanker trailers, and the cap O-ring seals the sensor compartment to prevent fuel or oil leaks. Over time, O-rings can harden, crack, or take a set, leading to leaks. Replacing this O-ring restores a proper seal and ensures safe, leak-free operation.
Part Number: 20766
ORING FOR PROBE HOLDER CAP
Unit: ea
Vendor: LittleJohn Inc.
Dealer: Post Onsite
Compatibility, alternatives, and more