PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21578Arrester,spark Exhaust

Walker Mfg Co · NSN 2990-01-218-2010 · FSC 2990 · No Item Name Available
Verified by PartsTable
NSN 2990-01-218-2010 — this item is cataloged by the U.S. Government under National Stock Number 2990-01-218-2010. Primary manufacturer part number: 21578.
Features
  • Arrester,spark Exhaust — FSC 2990
  • Surface Treatment: ALUMINUM ALLOY
  • Material: STEEL
  • Body Shape: ROUND
  • Device Design Type: DIRECTIONAL VANE
  • Overall Diameter: 6.000 INCHES NOMINAL IN
  • Operating Position: HORIZONTAL
  • 3 verified cross-references
Applications
  • Applications requiring Steel construction
General Description

The Arrester,spark Exhaust, cataloged under National Stock Number 2990-01-218-2010, is classified within Federal Supply Class 2990 (No Item Name Available) of the Engine Accessories group. The primary manufacturer of record is Walker Mfg Co. Government technical data includes 6 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 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: Active.

Technical Specifications
ParameterValue
NSN2990-01-218-2010
Primary Part Number21578
Item NameArrester,spark Exhaust
FSC / FSG2990 / 29 — No Item Name Available
ManufacturerWalker Mfg Co
StatusACTIVE
Surface TreatmentALUMINUM ALLOY
MaterialSTEEL
Body ShapeROUND
Device Design TypeDIRECTIONAL VANE
Overall Diameter6.000 INCHES NOMINAL IN
Operating PositionHORIZONTAL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
3120-00-005-8232477 INTERCHANGEABLE
Bearing,sleeve
Thern Inc
2540-00-019-78241H7486 INTERCHANGEABLE
Latch Assembly
Caterpillar Inc Div Caterpillar Defense
3110-00-100-0254477 INTERCHANGEABLE
Cone and Rollers,tapered Roller
The Timken Corporation
4530-00-180-5068 INTERCHANGEABLE
Nozzle,oil Burner,pressure Atomi
5935-00-258-4662277423 INTERCHANGEABLE
Connector,receptacle,electrical
Chief of Engineers Dept of Army
6515-00-357-9510 INTERCHANGEABLE
Sigmoidoscope
4320-00-930-518921578 INTERCHANGEABLE
Diffuser
Itt Marlow a Unit of Itt Pumps and Compressors Div
6630-01-056-4085477 INTERCHANGEABLE
Chromatograph,gas
Varian Associates Inc Instruments Div
6150-01-096-240021578 INTERCHANGEABLE
Wiring Harness,branched
Smiths Aerospace, Inc., Electronic Systems-Grand Rapids
5995-01-126-5726477 INTERCHANGEABLE
Lead,electrical
Meggitt North Hollywood Inc
Cross-Reference Index
Part NumberManufacturer
477 De Koven Mfg Co (USA)
5209252 Clark Equipment Co (USA)
21578 PRIMARY Walker Mfg Co (USA)
Related Parts
3120-00-005-8232INTERCHANGEABLE
BEARING,SLEEVE
477
2540-00-019-7824INTERCHANGEABLE
LATCH ASSEMBLY
1H7486
3110-00-100-0254INTERCHANGEABLE
CONE AND ROLLERS,TAPERED ROLLER
477
4530-00-180-5068INTERCHANGEABLE
NOZZLE,OIL BURNER,PRESSURE ATOMI
5935-00-258-4662INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
277423
6515-00-357-9510INTERCHANGEABLE
SIGMOIDOSCOPE
4320-00-930-5189INTERCHANGEABLE
DIFFUSER
21578
6630-01-056-4085INTERCHANGEABLE
CHROMATOGRAPH,GAS
477
6150-01-096-2400INTERCHANGEABLE
WIRING HARNESS,BRANCHED
21578
5995-01-126-5726INTERCHANGEABLE
LEAD,ELECTRICAL
477
5945-01-140-5619INTERCHANGEABLE
FLASHER,THERMAL
5996-01-151-1607INTERCHANGEABLE
AMPLIFIER,RADIO FREQUENCY
A100/C-01

Frequently Asked Questions

What is NSN 2990-01-218-2010?

NSN 2990-01-218-2010 is a Arrester,spark Exhaust, manufactured by Walker Mfg Co, classified under FSC 2990 (No Item Name Available). Status: active.

What are the part numbers for NSN 2990-01-218-2010?

NSN 2990-01-218-2010 has 3 cross-referenced part numbers: 477 (De Koven Mfg Co), 5209252 (Clark Equipment Co), 21578 (Walker Mfg Co).

What NSN replaces 2990-01-218-2010?

There are 12 known substitutes for 2990-01-218-2010: 3120-00-005-8232, 2540-00-019-7824, 3110-00-100-0254 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 21578?

Key specifications for 21578: Overall Length: 11.125 INCHES NOMINAL IN; Surface Treatment: ALUMINUM ALLOY; Material: STEEL; Special Features: U/W 2.000 IN. EXHAUST SYSTEM AND FURNISHED W/TWO REDUCING BUSHINGS IN. 8 total characteristics are documented in the Federal Logistics Information System.

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