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Eaton · Hardware & Fasteners
K4122
In stock · ships from Knoxville
The Eaton Fuller K4122 is a hex flange crimped nut kit used to lock the output yoke or flange onto the output shaft of heavy-duty Eaton Fuller manual transmissions.
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Verified fitment for 5 applications
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All confirmed applications for this part number.
Freightliner
International
Peterbilt
Volvo Trucks
Other applications
Freightliner
International
Peterbilt
Volvo Trucks
Other applications
Used on the output shaft of Eaton Fuller transmissions. Exact transmission models not specified in source data, but the nut is referenced in parts systems for the listed truck brands.
Part data verified against 5 catalog sources
Numbers this part supersedes or interchanges with. Showing 13 of 13.
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The nut is first torqued to 650–700 ft-lbs and then crimped into a groove on the shaft, which prevents it from loosening under vibration and torque loads. It is typically replaced whenever the transmission output seal is serviced, the yoke is changed, or the transmission is rebuilt, ensuring a secure driveline connection.
Part Number: K4122
KIT, HEX FLANGE CRIMPED NUT EATON
Vendor: DANA
Dealer: KP Services Crossville
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