Adapter, Flywheel Housing2990-01-077-2101

NSN 2990-01-077-2101 · NIIN 010772101 · Part number 9N2663

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

Government record, cited

NSN 2990-01-077-2101 — this item is cataloged by the U.S. Government under National Stock Number 2990-01-077-2101. Manufacturer of record part number: 9N2663.

Also searched as 2990-01-077-2101 · 2990010772101 · NIIN 010772101 · 01-077-2101 · FSC 2990 Miscellaneous Engine Accessories, Nonaircraft · CAGE 11083 · 9N2663 · MA1-21006

Nearby stock numbers ← 2990-01-077-1865 Pipe, Exhaust · 2990-01-077-2202 Connector, Exhaust Pipe →

Features

Adapter,flywheel Housing — FSC 2990
2 manufacturer part numbers on file
Manufacturer of record: Caterpillar Inc Div Caterpillar Defense

Identification

NSN: 2990-01-077-2101
NIIN: 010772101
FSC: 2990 — Miscellaneous Engine Accessories, Nonaircraft
FSG: 29 — Engine Accessories
Primary part number: 9N2663
Manufacturer: Caterpillar Inc Div Caterpillar Defense

General Description

The Adapter,flywheel Housing, cataloged under National Stock Number 2990-01-077-2101, 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.

Catalog Facts

Item Name	Adapter,flywheel Housing
FSC / FSG	2990 — Miscellaneous Engine Accessories, Nonaircraft (FSG 29)
Manufacturers	Caterpillar Inc Div Caterpillar Defense (CAGE 11083); Am General Llc (CAGE 34623)

Technical Specifications

Parameter	Value
NSN	2990-01-077-2101
Primary Part Number	9N2663
Item Name	Adapter,flywheel Housing
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
9N2663 PRIMARY	Caterpillar Inc Div Caterpillar Defense (USA)
MA1-21006	Am General Llc (USA)

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.

2990-00-001-0001

BLOWER ASSEMBLY

2990-00-001-1248

2990-00-001-1248 · Item name not on file

2990-00-001-1250

2990-00-001-1250 · Item name not on file

2990-00-001-2055

2990-00-001-2055 · Item name not on file

2990-00-001-3498

2990-00-001-3498 · Item name not on file

2990-00-001-3520

2990-00-001-3520 · Item name not on file

2990-00-001-3521

2990-00-001-3521 · Item name not on file

2990-00-001-3522

CAP ASSEMBLY,MUFFLE

Frequently Asked Questions

What is NSN 2990-01-077-2101?

NSN 2990-01-077-2101 is a Adapter,flywheel Housing, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.

What part numbers are listed for NSN 2990-01-077-2101?

NSN 2990-01-077-2101 has 2 manufacturer part numbers on file: 9N2663 (Caterpillar Inc Div Caterpillar Defense), MA1-21006 (Am General Llc).

Is NSN 2990-01-077-2101 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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