PartsTable TECHNICAL DATA SHEET

NSN 2990-01-156-9809Government record, cited

Cover, Turbocharger2990-01-156-9809

NSN 2990-01-156-9809 · NIIN 011569809 · Part number 5S3974

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

Government record, cited

NSN 2990-01-156-9809 — this item is cataloged by the U.S. Government under National Stock Number 2990-01-156-9809. Manufacturer of record part number: 5S3974.

Also searched as 2990-01-156-9809 · 2990011569809 · NIIN 011569809 · 01-156-9809 · FSC 2990 Miscellaneous Engine Accessories, Nonaircraft · CAGE 11083 · 5S3974 · IPD5S3974

Nearby stock numbers ← 2990-01-156-9808 Housing, Turbocharge · 2990-01-157-1315 Attaching Group, Spacer →

Features

Cover,turbocharger — FSC 2990
1 manufacturer part number on file
Manufacturer of record: Caterpillar Inc Div Caterpillar Defense

Identification

NSN: 2990-01-156-9809
NIIN: 011569809
FSC: 2990 — Miscellaneous Engine Accessories, Nonaircraft
FSG: 29 — Engine Accessories
Primary part number: 5S3974
Manufacturer: Caterpillar Inc Div Caterpillar Defense

General Description

The Cover,turbocharger, cataloged under National Stock Number 2990-01-156-9809, 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 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.

Catalog Facts

Item Name	Cover,turbocharger
FSC / FSG	2990 — Miscellaneous Engine Accessories, Nonaircraft (FSG 29)
Manufacturers	Caterpillar Inc Div Caterpillar Defense (CAGE 11083)

Technical Specifications

Parameter	Value
NSN	2990-01-156-9809
Primary Part Number	5S3974
Item Name	Cover,turbocharger
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)

Cross-Reference Index

Part Number	Manufacturer
5S3974 PRIMARY	Caterpillar Inc Div Caterpillar Defense (USA)

Reference documents

Reference	Meaning
IPD5S3974	5/9 Secondary reference Industrial Parts Depot, Llc Dba Ipd

No interchangeability data on file.

Other items in FSC 2990 — Miscellaneous Engine Accessories, Nonaircraft

Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.

2990-00-096-8607

CONTROL ASSEMBLY,PUSH-PULL

2990-00-390-3445

CRANK,HAND,VEHICULAR

2990-00-459-7255

MUFFLER,EXHAUST

2990-00-459-7255

MUFFLER,EXHAUST

2990-00-536-2962

BLOCK,ADJUSTING SCREW

2990-00-903-8226

MUFFLER,EXHAUST

2990-01-151-5443

CONNECTOR,EXHAUST PIPE

2990-01-151-5443

CONNECTOR,EXHAUST PIPE

Frequently Asked Questions

What is NSN 2990-01-156-9809?

NSN 2990-01-156-9809 is a Cover,turbocharger, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.

What part numbers are listed for NSN 2990-01-156-9809?

NSN 2990-01-156-9809 has 1 manufacturer part number on file: 5S3974 (Caterpillar Inc Div Caterpillar Defense).

Is NSN 2990-01-156-9809 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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