PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

204261Engine,diesel

Cummins Inc. · NSN 2815-00-403-5988 · FSC 2815 · No Item Name Available
Verified by PartsTable
NSN 2815-00-403-5988 — this item is cataloged by the U.S. Government under National Stock Number 2815-00-403-5988. Primary manufacturer part number: 204261.
Features
  • Engine,diesel — FSC 2815
  • Crankshaft Rotation Direction: CLOCKWISE
  • Strokes Per Cycle: 4
  • Piston Action Type: SINGLE ACTING
  • Starting Method: HYDRAULIC UNIT
  • Accessory Components and Quantity: AIR SILENCERS 2; CHEMICAL STARTING AID DEVICES 2; COOLER,FRESH WATER 1; COOLER,FUEL OIL 1; COOLER,OIL 1; FILTER,FUEL OIL 1; FILTER,OIL 3; GOVERNOR,SPEED 1; HEAT EXCHANGER 1; KI,HOT START 1; PAN,OIL 1; PUMP,FRESH WATER 1; PUMP,FUEL 1; PUMP,OIL 1; PUMP,SEA WATER 1; STRAINER,FUEL OIL 1; TANK,EXPANSION 1
  • Engine Overall Length: 73.438 INCHES NOMINAL IN
  • Stroke Length: 6.000 INCHES IN
Applications
  • Mechanical power generation
  • Drive system operation
  • Auxiliary equipment operation
General Description

The Engine,diesel, cataloged under National Stock Number 2815-00-403-5988, is classified within Federal Supply Class 2815 (No Item Name Available) of the Engines, Turbines, and Components group. The primary manufacturer of record is Cummins Inc.. Government technical data includes 14 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN2815-00-403-5988
Primary Part Number204261
Item NameEngine,diesel
FSC / FSG2815 / 28 — No Item Name Available
ManufacturerCummins Inc.
StatusACTIVE
Crankshaft Rotation DirectionCLOCKWISE
Strokes Per Cycle4
Piston Action TypeSINGLE ACTING
Starting MethodHYDRAULIC UNIT
Accessory Components and QuantityAIR SILENCERS 2; CHEMICAL STARTING AID DEVICES 2; COOLER,FRESH WATER 1; COOLER,FUEL OIL 1; COOLER,OIL 1; FILTER,FUEL OIL 1; FILTER,OIL 3; GOVERNOR,SPEED 1; HEAT EXCHANGER 1; KI,HOT START 1; PAN,OIL 1; PUMP,FRESH WATER 1; PUMP,FUEL 1; PUMP,OIL 1; PUMP,SEA WATER 1; STRAINER,FUEL OIL 1; TANK,EXPANSION 1
Engine Overall Length73.438 INCHES NOMINAL IN
Stroke Length6.000 INCHES IN
Engine Overall Width53.636 INCHES NOMINAL IN
Reference Number Differentiating CharacteristicsAS DIFFERENTIATED BY CRANKSHAFT ROTATION DIRECTION AND CONTRACT N00024-69-C-5509,ITEM 3
Engine Overall Height58.563 INCHES NOMINAL IN
Cylinder ArrangementSINGLE V-TYPE
Main Power Takeoff Rotation DirectionCLOCKWISE
Standard Bore Diameter5.500 INCHES IN
Cylinder Quantity12
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
2815-00-407-1087 INTERCHANGEABLE
Engine,diesel
4730-00-422-8955204261 INTERCHANGEABLE
Strainer Element,sediment
Bendix Commercial Vehicle Systems Llc Dba Bendix Commercial Vehicle Systems
8140-00-714-9127327941 INTERCHANGEABLE
Shipping and Storage Container,c
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
4910-01-118-449020-426-1 INTERCHANGEABLE
Jack,channel Assembly
Hunter Engineering Company Inc
4320-01-158-1351 INTERCHANGEABLE
Sleeve,piston
5315-01-337-4034 INTERCHANGEABLE
Pin,shoulder,headed
5360-01-359-2146204261 INTERCHANGEABLE
Spring,helical,compression
Aerosonic Llc
Cross-Reference Index
Part NumberManufacturer
204261 Cummins Inc. (USA)
Related Parts
2815-00-407-1087INTERCHANGEABLE
ENGINE,DIESEL
4730-00-422-8955INTERCHANGEABLE
STRAINER ELEMENT,SEDIMENT
204261
8140-00-714-9127INTERCHANGEABLE
SHIPPING AND STORAGE CONTAINER,C
327941
4910-01-118-4490INTERCHANGEABLE
JACK,CHANNEL ASSEMBLY
20-426-1
4320-01-158-1351INTERCHANGEABLE
SLEEVE,PISTON
5315-01-337-4034INTERCHANGEABLE
PIN,SHOULDER,HEADED
5360-01-359-2146INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
204261

Frequently Asked Questions

What is NSN 2815-00-403-5988?

NSN 2815-00-403-5988 is a Engine,diesel, manufactured by Cummins Inc., classified under FSC 2815 (No Item Name Available). Status: active.

What are the part numbers for NSN 2815-00-403-5988?

NSN 2815-00-403-5988 has 1 cross-referenced part number: 204261 (Cummins Inc.).

What NSN replaces 2815-00-403-5988?

There are 7 known substitutes for 2815-00-403-5988: 2815-00-407-1087, 4730-00-422-8955, 8140-00-714-9127 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 204261?

Key specifications for 204261: Crankshaft Rotation Direction: CLOCKWISE; Strokes Per Cycle: 4; Piston Action Type: SINGLE ACTING; Special Features: DRY OIL SUMP. 15 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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