Cummins 3803521 Valve, Poppet, Engine

Cummins 3803521 is a engine component in Engine Parts, US catalog. Listed by US Government (DLA FLIS), October 2026.

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

The U.S. government's Federal Logistics Information System (FLIS) records Cummins 3803521 as the maker's own number under government stock item NSN 2815-00-034-4701. The name and every fact below are FLIS's, credited to US Government (DLA FLIS), October 2026 edition.

Specifications recorded for government stock item NSN 2815-00-034-4701, under which this manufacturer's reference number is listed. Confirm compatibility and specifications with the manufacturer before ordering.

Government item name

Valve, Poppet, Engine

Government stock item (NSN)

2815-00-034-4701

Manufacturer code (CAGE)

15434, CUMMINS INC., COLUMBUS, IN, UNITED STATES

Head height

0.1840 to 0.1940 in

Chamfer angle in deg

45.0

Chamfer length

0.0150 to 0.0300 in

Outside diameter

1.2630 in (nominal)

Minor outside diameter

0.3080 in (nominal)

Minor diameter length

0.7500 in (nominal)

Seat angle in deg

30.0

Neck radius

0.4062 in (nominal)

Stem length

5.8350 to 5.8500 in

Stem diameter

0.3410 in (nominal)

Distance from first groove to stem end

0.3320 to 0.3630 in

Distance from second groove to stem end

0.7400 to 0.7600 in

First groove diameter

0.2400 to 0.2460 in

Second groove diameter

0.2400 to 0.4060 in

First groove width

0.0625 in (nominal)

Second groove width

0.0625 in (nominal)

Special features

Used on cumming diesel engines;MDL JN,JNS,JT

Material

• Head: steel corrosion resisting
• Stem: steel

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)

A part of an engine named by its use. Replaced when worn, leaking or damaged. Check the engine model and serial range.

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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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.