Damper, Exhaust Pipe, Diesel Engin2990-01-511-1850

NSN 2990-01-511-1850 · NIIN 015111850 · Part number OR7851 (REMANUFACTURED PART)

Caterpillar Inc Div Caterpillar Defense · FSC 2990 — Miscellaneous Engine Accessories, Nonaircraft · FSG 29 — Engine Accessories · CAGE 11083

Government record, cited

NSN 2990-01-511-1850 — this item is cataloged by the U.S. Government under National Stock Number 2990-01-511-1850. Manufacturer of record part number: OR7851 (REMANUFACTURED PART).

Also searched as 2990-01-511-1850 · 2990015111850 · NIIN 015111850 · 01-511-1850 · FSC 2990 Miscellaneous Engine Accessories, Nonaircraft · CAGE 11083 · OR7851 (REMANUFACTURED PART) · 171-4571

Nearby stock numbers ← 2990-01-511-1668 Sensor, Crankshaft Position, Emiss · 2990-01-511-4583 Heater, Coolant, Engine →

Features

Damper,exhaust Pipe,diesel Engin — FSC 2990
2 manufacturer part numbers on file
Manufacturer of record: Caterpillar Inc Div Caterpillar Defense

Identification

NSN: 2990-01-511-1850
NIIN: 015111850
FSC: 2990 — Miscellaneous Engine Accessories, Nonaircraft
FSG: 29 — Engine Accessories
Primary part number: OR7851 (REMANUFACTURED PART)
Manufacturer: Caterpillar Inc Div Caterpillar Defense

General Description

The Damper,exhaust Pipe,diesel Engin, cataloged under National Stock Number 2990-01-511-1850, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Caterpillar Inc Div Caterpillar Defense. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	2990-01-511-1850
Primary Part Number	OR7851 (REMANUFACTURED PART)
Item Name	Damper,exhaust Pipe,diesel Engin
FSC / FSG	2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft
Manufacturer	Caterpillar Inc Div Caterpillar Defense
Status	ACTIVE

Lifecycle & Compliance

Acquisition Status	ACTIVE
DEMIL Code	DEMIL A — No Demilitarization Required
Hazard	No hazard code in the DLA record (HMIC N)
Criticality Code	X

Cross-Reference Index

Part Number	Manufacturer
OR7851 (REMANUFACTURED PART) PRIMARY	Caterpillar Inc Div Caterpillar Defense (USA)
171-4571 PRIMARY	Caterpillar Inc Div Caterpillar Defense (USA)

Frequently Asked Questions

What is NSN 2990-01-511-1850?

NSN 2990-01-511-1850 is a Damper,exhaust Pipe,diesel Engin, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.

What part numbers are listed for NSN 2990-01-511-1850?

NSN 2990-01-511-1850 has 2 manufacturer part numbers on file: OR7851 (REMANUFACTURED PART) (Caterpillar Inc Div Caterpillar Defense), 171-4571 (Caterpillar Inc Div Caterpillar Defense).

What are the specifications of OR7851 (REMANUFACTURED PART)?

Key specifications for OR7851 (REMANUFACTURED PART): Part Name Assigned by Controlling Agency: (INAVY): DAMPER GROUP; End Item Identification: ENGINE, DIESEL MDL 3512B. 0 specifications are documented in the U.S. Government catalog.

Is NSN 2990-01-511-1850 hazardous material?

No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.

Sources

U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.

U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.

✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.

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