Pipe, Exhaust2990-01-458-9003

NSN 2990-01-458-9003 · NIIN 014589003 · Part number 126-3558

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

Government record, cited

NSN 2990-01-458-9003 — this item is cataloged by the U.S. Government under National Stock Number 2990-01-458-9003. Manufacturer of record part number: 126-3558.

Also searched as 2990-01-458-9003 · 2990014589003 · NIIN 014589003 · 01-458-9003 · FSC 2990 Miscellaneous Engine Accessories, Nonaircraft · CAGE 11083 · 126-3558

Nearby stock numbers ← 2990-01-458-7104 Kit, Speed Control · 2990-01-458-9247 Starter Rope, Engine →

Features

Pipe,exhaust — FSC 2990
Design Form: STRAIGHT
Nominal Overall Length: 120.000 INCHES IN
Wall Thickness: 0.0897 INCHES NOMINAL IN
Nominal Outside Diameter: 4.000 INCHES IN
Material: STEEL
1 manufacturer part number on file
Manufacturer of record: Caterpillar Inc Div Caterpillar Defense

Identification

NSN: 2990-01-458-9003
NIIN: 014589003
FSC: 2990 — Miscellaneous Engine Accessories, Nonaircraft
FSG: 29 — Engine Accessories
Primary part number: 126-3558
Manufacturer: Caterpillar Inc Div Caterpillar Defense

General Description

The Pipe,exhaust, cataloged under National Stock Number 2990-01-458-9003, 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. Government technical data includes 5 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	2990-01-458-9003
Primary Part Number	126-3558
Item Name	Pipe,exhaust
FSC / FSG	2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft
Manufacturer	Caterpillar Inc Div Caterpillar Defense
Status	ACTIVE
Design Form	STRAIGHT
Nominal Overall Length	120.000 INCHES IN
Wall Thickness	0.0897 INCHES NOMINAL IN
Nominal Outside Diameter	4.000 INCHES IN
Material	STEEL

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
126-3558 PRIMARY	Caterpillar Inc Div Caterpillar Defense (USA)

Frequently Asked Questions

What is NSN 2990-01-458-9003?

NSN 2990-01-458-9003 is a Pipe,exhaust, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.

What part numbers are listed for NSN 2990-01-458-9003?

NSN 2990-01-458-9003 has 1 manufacturer part number on file: 126-3558 (Caterpillar Inc Div Caterpillar Defense).

What are the specifications of 126-3558?

Key specifications for 126-3558: Design Form: STRAIGHT; Nominal Overall Length: 120.000 INCHES IN; Wall Thickness: 0.0897 INCHES NOMINAL IN; Nominal Outside Diameter: 4.000 INCHES IN. 5 specifications are documented in the U.S. Government catalog.

Is NSN 2990-01-458-9003 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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