Cummins 4000643 Engine seal

Cummins 4000643 is a engine seal in Engine Parts, US catalog. Listed by Engine parts list (publisher, brand and date not printed).

SEAL,VALVE STEM

Specifications

Part type taken from

the printed name (SearchForPart's reviewed name list)

Government data (US Government (DLA FLIS), October 2026 edition)

The U.S. government's Federal Logistics Information System (FLIS) records Cummins 4000643 as the maker's own number under government stock item NSN 5330-01-474-9579. Shown beside the catalog facts above, not in their place.

Government item name

Seal, Plain

Government stock item (NSN)

5330-01-474-9579

Other reference numbers listed under the same stock item

• CUMMINS INC. 3076894

These numbers are recorded under the same government stock item. That is not a statement that the parts replace each other or fit the same equipment: confirm with the manufacturer.

Source: US Government (DLA FLIS), October 2026 edition, a public U.S. government data release. This is not an official DLA record and may contain errors. Verify fitment before ordering. Not affiliated with or endorsed by the Defense Logistics Agency or the Department of Defense. SearchForPart does not show a price here.

About this kind of part (general, written by SearchForPart)

Keeps oil, coolant, fuel or air inside the engine where a shaft turns or two parts meet. Leaks at the crankshaft ends or around shafts are the usual sign. Check shaft size and position (front or rear).

When ordering, give the part number exactly as printed and its maker, and the make, model and year of the truck, trailer, reefer unit or machine (or the engine or unit serial number). SearchForPart shows fitment only as the source printed it: check it before you order.

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Catalog information provided by Engine parts list (publisher, brand and date not printed). Fitment for your equipment is not verified by this page. SearchForPart does not show a price here.