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Post Onsite · Suspension & Steering
UB78312
In stock · ships from Knoxville
This is a U-bolt kit for heavy-duty truck leaf spring suspensions.
Confirm the part fits before you buy. Applications and interchange numbers are researched and audited per part.
Verified fitment for 7 applications
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All confirmed applications for this part number.
Kenworth
Peterbilt
Other applications
Kenworth
Peterbilt
Other applications
Fits many Class 8 trucks and trailers with the listed suspension brands. Always verify your specific axle seat width and spring pack thickness before ordering.
Part data verified against 5 catalog sources
Numbers this part supersedes or interchanges with. Showing 16 of 33.
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It includes two U-bolts, four washers, and four deep nuts, made of Grade 8 steel with a 7/8-inch diameter fine thread. Designed to fit around a 3-inch wide axle seat and leaf spring pack, the 12-inch long bolts securely clamp the axle to the suspension. You typically replace U-bolts when servicing springs, upgrading components, or when the old bolts are stretched, corroded, or no longer torque properly.
Part Number: UB78312
U-BOLT KIT 7/8X3X12
Unit: ea
Dealer: Post Onsite
Compatibility, alternatives, and more
Parts commonly needed alongside suspension & steering
