PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

204261Engine,diesel

Cummins Inc. · NSN 2815-00-407-1087 · FSC 2815 · No Item Name Available
Verified by PartsTable
NSN 2815-00-407-1087 — this item is cataloged by the U.S. Government under National Stock Number 2815-00-407-1087. Primary manufacturer part number: 204261.
Features
  • Engine,diesel — FSC 2815
  • Cylinder Quantity: 12
  • Piston Action Type: SINGLE ACTING
  • Reference Number Differentiating Characteristics: AS DIFFERENTIATED BY CRANKSHAFT ROTATION DIRECTION,AND CONTRACT N00024-69-C-5009,ITEM 4
  • Stroke Length: 6.000 INCHES IN
  • Starting Method: HYDRAULIC UNIT
  • Strokes Per Cycle: 4
  • Crankshaft Rotation Direction: COUNTERCLOCKWISE
Applications
  • Mechanical power generation
  • Drive system operation
  • Auxiliary equipment operation
General Description

The Engine,diesel, cataloged under National Stock Number 2815-00-407-1087, 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
NSN2815-00-407-1087
Primary Part Number204261
Item NameEngine,diesel
FSC / FSG2815 / 28 — No Item Name Available
ManufacturerCummins Inc.
StatusACTIVE
Cylinder Quantity12
Piston Action TypeSINGLE ACTING
Reference Number Differentiating CharacteristicsAS DIFFERENTIATED BY CRANKSHAFT ROTATION DIRECTION,AND CONTRACT N00024-69-C-5009,ITEM 4
Stroke Length6.000 INCHES IN
Starting MethodHYDRAULIC UNIT
Strokes Per Cycle4
Crankshaft Rotation DirectionCOUNTERCLOCKWISE
Accessory Components and QuantityAIR SILENCER 2,CHEMICAL STARTING AID DEVICE 2,COOLER,FRESH WATER 1,COOLER,FUEL OIL 1,COOLER,LUBRICATING OIL 1,FILTER,FUEL OIL 1,FILTER,LUBRICATING OIL 1,FILTER,OIL BYPASS 1,GOVERNOR 1,HEAT EXCHANGER 1,KIM HOT START 1,PAN,OIL 1,PUMP,FRESH WATER 1,PUMP,FUEL INJECTOR 1,PUMP,LUBRICATING OIL 1,PUMP,SEA WATER 1,STRAINER,FUEL OIL 1,TANK,EXPANSION,WATER 1
Engine Overall Height58.563 INCHES NOMINAL IN
Cylinder ArrangementSINGLE V-TYPE
Engine Overall Length73.438 INCHES NOMINAL IN
Main Power Takeoff Rotation DirectionCOUNTERCLOCKWISE
Engine Overall Width53.656 INCHES NOMINAL IN
Standard Bore Diameter5.500 INCHES IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
2815-00-403-5988 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
2815-00-403-5988INTERCHANGEABLE
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 2815-00-407-1087?

NSN 2815-00-407-1087 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 2815-00-407-1087?

NSN 2815-00-407-1087 has 1 cross-referenced part number: 204261 (Cummins Inc.).

What NSN replaces 2815-00-407-1087?

There are 7 known substitutes for 2815-00-407-1087: 2815-00-403-5988, 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: Cylinder Quantity: 12; Piston Action Type: SINGLE ACTING; Reference Number Differentiating Characteristics: AS DIFFERENTIATED BY CRANKSHAFT ROTATION DIRECTION,AND CONTRACT N00024-69-C-5009,ITEM 4; Stroke Length: 6.000 INCHES IN. 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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