Threaded Plug 3678838, which replaces 5409625, fits a broad range of Cummins engines including B6.7, 6C8.3, ISG12, ISX, QSX, X11.9, X12, X15, ISZ, QSZ, Z13, QSK, M15, QST30, and QSV91. It seals threaded ports against leaks under pressure. Made to OEM specs for a precise, dependable fit.
Condition:New / OEM Quality
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