PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

7S4992Cap Assembly,protective,muffler-

Caterpillar Inc Div Caterpillar Defense · NSN 2990-00-456-1477 · FSC 2990 · No Item Name Available
Verified by PartsTable
NSN 2990-00-456-1477 — this item is cataloged by the U.S. Government under National Stock Number 2990-00-456-1477. Primary manufacturer part number: 7S4992.
Features
  • Cap Assembly,protective,muffler- — FSC 2990
  • Material: ALUMINUM
  • Pipe Outside Diameter Accommodated: 3.000 INCHES IN
  • 4 verified cross-references
  • Primary manufacturer: Caterpillar Inc Div Caterpillar Defense
Applications
  • Applications requiring Aluminum construction
General Description

The Cap Assembly,protective,muffler-, cataloged under National Stock Number 2990-00-456-1477, is classified within Federal Supply Class 2990 (No Item Name Available) of the Engine Accessories group. The primary manufacturer of record is Caterpillar Inc Div Caterpillar Defense. Government technical data includes 2 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN2990-00-456-1477
Primary Part Number7S4992
Item NameCap Assembly,protective,muffler-
FSC / FSG2990 / 29 — No Item Name Available
ManufacturerCaterpillar Inc Div Caterpillar Defense
StatusCANCELLED
MaterialALUMINUM
Pipe Outside Diameter Accommodated3.000 INCHES IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
2530-00-212-19119373 INTERCHANGEABLE
Rim,wheel,pneumatic Tire
Saginaw Products Corporation Dba Cignys
4730-00-288-9363SAE J512 3-2 040302BA INTERCHANGEABLE
Elbow,pipe to Tube
Sae International Dba Sae International
4210-00-472-42159373 INTERCHANGEABLE
Charge,fire Extinguisher
Tyco Fire Products Lp
4820-00-588-787011077 INTERCHANGEABLE
Valve Assembly
Elbitamerica, Inc.
4530-00-807-77289373 INTERCHANGEABLE
Ring
R. D. Miners, Inc Dba Ray Burner Co
5910-01-046-93779373 INTERCHANGEABLE
Capacitor,variable,ceramic Diele
Knowles Cazenovia, Inc. Div Johanson Manufacturing
6540-01-078-924811077 INTERCHANGEABLE
Slide,ophthalmic Projector
Reichert Inc Dba Reichert Inc
5340-01-176-949711077 INTERCHANGEABLE
Cover,access
DP Manufacturing Inc.
5310-01-190-3916B039 INTERCHANGEABLE
Nut,shaft Sleeve,r
Circor Naval Solutions Llc Dba Warren Pumps
4440-01-200-5645 INTERCHANGEABLE
Upper Cap Assembly
Cross-Reference Index
Part NumberManufacturer
9373 Ap Parts Co Industrial Sales Div (USA)
7S4992 PRIMARY Caterpillar Inc Div Caterpillar Defense (USA)
11077 Gleason Corp Anthes Div (USA)
9F9961 Caterpillar Inc Div Caterpillar Defense (USA)
Related Parts
2530-00-212-1911INTERCHANGEABLE
RIM,WHEEL,PNEUMATIC TIRE
9373
4730-00-288-9363INTERCHANGEABLE
ELBOW,PIPE TO TUBE
SAE J512 3-2 040302BA
4210-00-472-4215INTERCHANGEABLE
CHARGE,FIRE EXTINGUISHER
9373
4820-00-588-7870INTERCHANGEABLE
VALVE ASSEMBLY
11077
4530-00-807-7728INTERCHANGEABLE
RING
9373
5910-01-046-9377INTERCHANGEABLE
CAPACITOR,VARIABLE,CERAMIC DIELE
9373
6540-01-078-9248INTERCHANGEABLE
SLIDE,OPHTHALMIC PROJECTOR
11077
5340-01-176-9497INTERCHANGEABLE
COVER,ACCESS
11077
5310-01-190-3916INTERCHANGEABLE
NUT,SHAFT SLEEVE,R
B039
4440-01-200-5645INTERCHANGEABLE
UPPER CAP ASSEMBLY
6515-01-203-8584INTERCHANGEABLE
TUBING,SURGICAL
5331-01-214-5091INTERCHANGEABLE
O-RING
40034-02

Frequently Asked Questions

What is NSN 2990-00-456-1477?

NSN 2990-00-456-1477 is a Cap Assembly,protective,muffler-, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 2990 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 2990-00-456-1477?

NSN 2990-00-456-1477 has 4 cross-referenced part numbers: 9373 (Ap Parts Co Industrial Sales Div), 7S4992 (Caterpillar Inc Div Caterpillar Defense), 11077 (Gleason Corp Anthes Div), 9F9961 (Caterpillar Inc Div Caterpillar Defense).

What NSN replaces 2990-00-456-1477?

There are 12 known substitutes for 2990-00-456-1477: 2530-00-212-1911, 4730-00-288-9363, 4210-00-472-4215 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 7S4992?

Key specifications for 7S4992: Material: ALUMINUM; Pipe Outside Diameter Accommodated: 3.000 INCHES IN. 2 total characteristics are documented in the Federal Logistics Information System.

Is NSN 2990-00-456-1477 still in active supply?

NSN 2990-00-456-1477 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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