Muffler Brace Assembly2990-01-090-1122

NSN 2990-01-090-1122 · NIIN 010901122

FSC 2990 — Miscellaneous Engine Accessories, Nonaircraft · FSG 29 — Engine Accessories

Government record, cited

Also searched as 2990-01-090-1122 · 2990010901122 · NIIN 010901122 · 01-090-1122 · FSC 2990 Miscellaneous Engine Accessories, Nonaircraft

Nearby stock numbers ← 2990-01-090-1121 Muffler Brace Assembly · 2990-01-090-1276 Guard Assembly →

Features

Muffler Brace Assembly — FSC 2990
FSC Application Data: MISCELLANEOUS ENGINE ACCESSORIES,NONAIRCRAFT
General Characteristics Item Description: PROVIDED WITH 2 MOUNTING HOLES TOSECURE EXHAUST SYSTEM SECURING BRACES;MOUNTED ON EXHAUST AIR CHAMBERS

Identification

NSN: 2990-01-090-1122
NIIN: 010901122
FSC: 2990 — Miscellaneous Engine Accessories, Nonaircraft
FSG: 29 — Engine Accessories

General Description

The Muffler Brace Assembly, cataloged under National Stock Number 2990-01-090-1122, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. Government technical data includes 2 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	2990-01-090-1122
Item Name	Muffler Brace Assembly
FSC / FSG	2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft
Status	ACTIVE
FSC Application Data	MISCELLANEOUS ENGINE ACCESSORIES,NONAIRCRAFT
General Characteristics Item Description	PROVIDED WITH 2 MOUNTING HOLES TOSECURE EXHAUST SYSTEM SECURING BRACES;MOUNTED ON EXHAUST AIR CHAMBERS

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

No manufacturer part numbers on file in the U.S. Government catalog.

Reference documents

Reference	Meaning
88694	3/9 Design control — primary reference U.S. Government activity

Frequently Asked Questions

What is NSN 2990-01-090-1122?

NSN 2990-01-090-1122 is a Muffler Brace Assembly, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.

What are the specifications of 2990-01-090-1122?

Key specifications for 2990-01-090-1122: FSC Application Data: MISCELLANEOUS ENGINE ACCESSORIES,NONAIRCRAFT; General Characteristics Item Description: PROVIDED WITH 2 MOUNTING HOLES TOSECURE EXHAUST SYSTEM SECURING BRACES;MOUNTED ON EXHAUST AIR CHAMBERS; End Item Identification: EXHAUST AIR CHAMBER ASSY,FSCM 89307,P/N 89309 AND 89309-1 FOR PRESSURIZED CABIN TESTER 4920-00-347-9455. 2 specifications are documented in the U.S. Government catalog.

Is NSN 2990-01-090-1122 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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