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Dayton Parts · Hardware & Fasteners
DN78
In stock · ships from Knoxville
This is a deep hex nut, commonly called a 'high nut,' designed to secure U-bolts on leaf spring assemblies in heavy-duty truck and trailer suspensions.
Confirm the part fits before you buy. Applications and interchange numbers are researched and audited per part.
Verified fitment for 1 applications
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All confirmed applications for this part number.
Universal fit
Fits any U-bolt with 7/8-14 fine threads. While verified as a direct replacement for certain Dayton applications, specific vehicle makes/models are not documented. It is a standard hardware item used across many leaf spring axle setups.
Part data verified against 4 catalog sources
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It threads onto the 7/8-inch legs of the U-bolt to clamp the axle to the leaf springs. These nuts are typically replaced when old ones have rusted, stripped, or been lost during spring or axle service.
Part Number: DN78
7/8 HI-NUT FOR U-BOLTS
Unit: ea
Dealer: Post Onsite
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