PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

5238GX2Cap Assembly,protective,muffler-

Oshkosh Defense Llc · NSN 2990-00-089-2079 · FSC 2990 · No Item Name Available
Verified by PartsTable
NSN 2990-00-089-2079 — this item is cataloged by the U.S. Government under National Stock Number 2990-00-089-2079. Primary manufacturer part number: 5238GX2.
Features
  • Cap Assembly,protective,muffler- — FSC 2990
  • Criticality Code Justification: FEAT
  • Material: STEEL
  • 25 verified cross-references
  • Primary manufacturer: Oshkosh Defense Llc
Applications
  • Applications requiring Steel construction
General Description

The Cap Assembly,protective,muffler-, cataloged under National Stock Number 2990-00-089-2079, is classified within Federal Supply Class 2990 (No Item Name Available) of the Engine Accessories group. The primary manufacturer of record is Oshkosh Defense Llc. Government technical data includes 2 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 25 commercial cross-references from 19 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
NSN2990-00-089-2079
Primary Part Number5238GX2
Item NameCap Assembly,protective,muffler-
FSC / FSG2990 / 29 — No Item Name Available
ManufacturerOshkosh Defense Llc
StatusCANCELLED
Criticality Code JustificationFEAT
MaterialSTEEL
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5136-00-227-8629 INTERCHANGEABLE
Tap,thread Cutting
5133-00-228-1377 INTERCHANGEABLE
Drill,twist
5325-00-254-3454FS4020 INTERCHANGEABLE
Grommet,nonmetallic
Titan Wheel Corporation of Illinois
5330-00-276-602111017 INTERCHANGEABLE
Packing Assembly
Komatsu America Corporation
6210-00-299-553821-1310-2900-301 INTERCHANGEABLE
Light,panel
Dialight Corporation
3020-00-351-8995 INTERCHANGEABLE
Gear,helical
6680-00-624-85231836560 INTERCHANGEABLE
Counter,rotating
Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier
3040-00-690-0381 INTERCHANGEABLE
Shaft,shouldered
5331-00-823-4909110-17 INTERCHANGEABLE
O-Ring
Robert H Wager Co Inc
2990-00-870-752011016 INTERCHANGEABLE
Cap Assembly,protective,muffler-
Gleason Corp
Cross-Reference Index
Part NumberManufacturer
FB0046-51N0D Mercury Products Corp (USA)
51N0D Mercury Products Corp (USA)
5238GX2 Jlg Industries (australia) Jlg Australia Pty Limited (AUS)
5238GX2 PRIMARY Oshkosh Defense Llc (USA)
NUMBER 16 Gleason Corp Anthes Div (USA)
RCG500 Riker Products (USA)
P27-0541 Donaldson Company, Inc. (USA)
11017-16 Gleason Corp Anthes Div (USA)
61949 Davey Compressor Co Div of Keco Industries Inc (USA)
RCG500 Am-Mac Incorporated (USA)
5IN0D Mercury Products Corp (USA)
5238GX2 Jlg Industries (australia) Jlg Industries Inc (AUS)
610210C91 Navistar International Corporation Dba Navistar (USA)
9148003 Terex Corp (USA)
1004903-080 Tld Ace Corp Div Tld Ace (USA)
RC5 PRIMARY Associated Piping and Engineering Co Inc Sub of Johnson Controls Inc (USA)
FB5300 Mercury Products Corp (USA)
EE42644 Oshkosh Corp (USA)
5238GX2 Oshkosh Corp (USA)
11017 Gleason Corp Anthes Div (USA)
Related Parts
5136-00-227-8629INTERCHANGEABLE
TAP,THREAD CUTTING
5133-00-228-1377INTERCHANGEABLE
DRILL,TWIST
5325-00-254-3454INTERCHANGEABLE
GROMMET,NONMETALLIC
FS4020
5330-00-276-6021INTERCHANGEABLE
PACKING ASSEMBLY
11017
6210-00-299-5538INTERCHANGEABLE
LIGHT,PANEL
21-1310-2900-301
3020-00-351-8995INTERCHANGEABLE
GEAR,HELICAL
6680-00-624-8523INTERCHANGEABLE
COUNTER,ROTATING
1836560
3040-00-690-0381INTERCHANGEABLE
SHAFT,SHOULDERED
5331-00-823-4909INTERCHANGEABLE
O-RING
110-17
2990-00-870-7520INTERCHANGEABLE
CAP ASSEMBLY,PROTECTIVE,MUFFLER-
11016
6680-00-919-6110INTERCHANGEABLE
VALVE
A11017
3415-00-973-1606INTERCHANGEABLE
GRINDING MACHINE,CYLINDRICAL
5RC

Frequently Asked Questions

What is NSN 2990-00-089-2079?

NSN 2990-00-089-2079 is a Cap Assembly,protective,muffler-, manufactured by Oshkosh Defense Llc, classified under FSC 2990 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 2990-00-089-2079?

NSN 2990-00-089-2079 has 25 cross-referenced part numbers: FB0046-51N0D (Mercury Products Corp), 51N0D (Mercury Products Corp), 5238GX2 (Jlg Industries (australia) Jlg Australia Pty Limited), 5238GX2 (Oshkosh Defense Llc), NUMBER 16 (Gleason Corp Anthes Div) and 20 more.

What NSN replaces 2990-00-089-2079?

There are 12 known substitutes for 2990-00-089-2079: 5136-00-227-8629, 5133-00-228-1377, 5325-00-254-3454 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 5238GX2?

Key specifications for 5238GX2: Criticality Code Justification: FEAT; End Item Identification: INTERNAL HARVESTER TRUCK MODEL NO.4070;GRUMMAN AEROSPACE A-10 AIRCRAFT; HEMTT (HEAVY EXPANDED MOBILITY TACTICAL TRUCK); Special Features: WEAPON SYSTEM ESSENTIAL; Material: STEEL. 4 total characteristics are documented in the Federal Logistics Information System.

Is NSN 2990-00-089-2079 still in active supply?

NSN 2990-00-089-2079 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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