PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

17644-4Filter Body,fluid

Lockheed Martin Corp · NSN 1650-00-672-7902 · FSC 1650 · No Item Name Available
Verified by PartsTable
NSN 1650-00-672-7902 — this item is cataloged by the U.S. Government under National Stock Number 1650-00-672-7902. Primary manufacturer part number: 17644-4.
Features
  • Filter Body,fluid — FSC 1650
  • Material: MAGNESIUM ALLOY BODY
  • Body Length: 3.500 INCHES NOMINAL IN
  • FSC Application Data: DRIVE,CONSTANT SPEED,PNEUMATIC 1650006223297 P/N 20351-1 TYPE TB25-2B
  • Body Outside Diameter: 2.625 INCHES NOMINAL IN
  • 4 verified cross-references
  • Primary manufacturer: Lockheed Martin Corp
Applications
  • Fluid filtration and purification
  • Engine intake air cleaning
  • Hydraulic system protection
  • Applications requiring Magnesium Alloy Body construction
General Description

The Filter Body,fluid, cataloged under National Stock Number 1650-00-672-7902, is classified within Federal Supply Class 1650 (No Item Name Available) of the Aircraft Components and Accessories group. The primary manufacturer of record is Lockheed Martin Corp. Government technical data includes 4 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN1650-00-672-7902
Primary Part Number17644-4
Item NameFilter Body,fluid
FSC / FSG1650 / 16 — No Item Name Available
ManufacturerLockheed Martin Corp
StatusACTIVE
MaterialMAGNESIUM ALLOY BODY
Body Length3.500 INCHES NOMINAL IN
FSC Application DataDRIVE,CONSTANT SPEED,PNEUMATIC 1650006223297 P/N 20351-1 TYPE TB25-2B
Body Outside Diameter2.625 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
2815-00-179-795242357 INTERCHANGEABLE
Cover,engine Poppet Valve Rocker
Cummins Inc.
5310-00-599-8141176444 INTERCHANGEABLE
Washer,flat
Lockheed Martin Corp
3120-01-367-6407163B5848 INTERCHANGEABLE
Bearing,plain,self-Aligning
Roller Bearing Company of America, Inc.
Cross-Reference Index
Part NumberManufacturer
17644-4 Defense & Development Enterprises Llc (USA)
17644-4 Triumph Thermal Systems - Maryland, Inc. (USA)
17644-4 Hiller Aircraft Corporation (USA)
17644-4 PRIMARY Lockheed Martin Corp (USA)
Related Parts
2815-00-179-7952INTERCHANGEABLE
COVER,ENGINE POPPET VALVE ROCKER
42357
5310-00-599-8141INTERCHANGEABLE
WASHER,FLAT
176444
3120-01-367-6407INTERCHANGEABLE
BEARING,PLAIN,SELF-ALIGNING
163B5848

Frequently Asked Questions

What is NSN 1650-00-672-7902?

NSN 1650-00-672-7902 is a Filter Body,fluid, manufactured by Lockheed Martin Corp, classified under FSC 1650 (No Item Name Available). Status: active.

What are the part numbers for NSN 1650-00-672-7902?

NSN 1650-00-672-7902 has 4 cross-referenced part numbers: 17644-4 (Defense & Development Enterprises Llc), 17644-4 (Triumph Thermal Systems - Maryland, Inc.), 17644-4 (Hiller Aircraft Corporation), 17644-4 (Lockheed Martin Corp).

What NSN replaces 1650-00-672-7902?

There are 3 known substitutes for 1650-00-672-7902: 2815-00-179-7952, 5310-00-599-8141, 3120-01-367-6407. Verify interchangeability with system specifications before substitution.

What are the specifications of 17644-4?

Key specifications for 17644-4: Material: MAGNESIUM ALLOY BODY; Body Length: 3.500 INCHES NOMINAL IN; FSC Application Data: DRIVE,CONSTANT SPEED,PNEUMATIC 1650006223297 P/N 20351-1 TYPE TB25-2B; Body Outside Diameter: 2.625 INCHES NOMINAL IN. 4 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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