PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

44487Crankcase Assembly

Cat Pumps Corp · NSN 4320-01-649-3657 · FSC 4320 · No Item Name Available
Verified by PartsTable
NSN 4320-01-649-3657 — this item is cataloged by the U.S. Government under National Stock Number 4320-01-649-3657. Primary manufacturer part number: 44487.
Features
  • Crankcase Assembly — FSC 4320
  • 1 verified cross-reference
  • Primary manufacturer: Cat Pumps Corp
Applications
  • Hydraulic and pneumatic systems
  • Industrial process pumping
  • Military vehicle hydraulics
General Description

The Crankcase Assembly, cataloged under National Stock Number 4320-01-649-3657, is classified within Federal Supply Class 4320 (No Item Name Available) of the Pumps and Compressors group. The primary manufacturer of record is Cat Pumps Corp. This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4320-01-649-3657
Primary Part Number44487
Item NameCrankcase Assembly
FSC / FSG4320 / 43 — No Item Name Available
ManufacturerCat Pumps Corp
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
2810-00-165-501644487 INTERCHANGEABLE
Connection,main Oil
Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp.
7520-00-460-75987520-00-460-7598 INTERCHANGEABLE
Marker,tube Type
National Industries for the Blind
2825-01-220-103044487 INTERCHANGEABLE
Gland Case,steam Turbine
Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions
9540-01-296-427944487 INTERCHANGEABLE
Angle,structural
Aluminum Co of America
5305-01-549-574744487 INTERCHANGEABLE
Screw,cap,hexagon Head
Barnes Group Inc. Dba Barnes Distribution
Cross-Reference Index
Part NumberManufacturer
44487 PRIMARY Cat Pumps Corp (USA)
Related Parts
2810-00-165-5016INTERCHANGEABLE
CONNECTION,MAIN OIL
44487
7520-00-460-7598INTERCHANGEABLE
MARKER,TUBE TYPE
7520-00-460-7598
2825-01-220-1030INTERCHANGEABLE
GLAND CASE,STEAM TURBINE
44487
9540-01-296-4279INTERCHANGEABLE
ANGLE,STRUCTURAL
44487
5305-01-549-5747INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
44487

Frequently Asked Questions

What is NSN 4320-01-649-3657?

NSN 4320-01-649-3657 is a Crankcase Assembly, manufactured by Cat Pumps Corp, classified under FSC 4320 (No Item Name Available). Status: active.

What are the part numbers for NSN 4320-01-649-3657?

NSN 4320-01-649-3657 has 1 cross-referenced part number: 44487 (Cat Pumps Corp).

What NSN replaces 4320-01-649-3657?

There are 5 known substitutes for 4320-01-649-3657: 2810-00-165-5016, 7520-00-460-7598, 2825-01-220-1030 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 44487?

Key specifications for 44487: Special Features: CRANKCASE MATERIAL IS NICKEL ALUMINUM BRONZE; Part Name Assigned by Controlling Agency: CRANKCASE ASSEMBLY. 2 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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