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Heil Tank Service · Engine
021-3707
In stock · ships from Knoxville
This is a head stiffener, a structural reinforcement component typically bolted or welded to the tank head of a Heil bulk trailer.
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.
Its primary job is to strengthen the end cap of the tank against pressure surges and road vibrations, preventing fatigue cracks and deformation. You'd replace it if the original stiffener has rusted through, cracked from stress, or been damaged in an accident, as a compromised stiffener can lead to tank integrity failure. This particular part is associated with Heil Tank Service and is commonly used on petroleum or dry bulk trailers.
Part Number: 021-3707
HEAD STIFFENER
Unit: ea
Vendor: Heil Tank Service
Dealer: Post Onsite
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