PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

256096Carbon Seal,engine

Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney · NSN 2840-01-020-8686 · FSC 2840 · No Item Name Available
Verified by PartsTable
NSN 2840-01-020-8686 — this item is cataloged by the U.S. Government under National Stock Number 2840-01-020-8686. Primary manufacturer part number: 256096.
Features
  • Carbon Seal,engine — FSC 2840
  • General Characteristics Item Description: GRAPHITIC CARBON MATERIAL
  • 1 verified cross-reference
  • Primary manufacturer: Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney
Applications
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
  • Environmental sealing
  • Mechanical power generation
  • Drive system operation
General Description

The Carbon Seal,engine, cataloged under National Stock Number 2840-01-020-8686, is classified within Federal Supply Class 2840 (No Item Name Available) of the Engines, Turbines, and Components group. The primary manufacturer of record is Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney. Government technical data includes 1 verified specification, 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. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN2840-01-020-8686
Primary Part Number256096
Item NameCarbon Seal,engine
FSC / FSG2840 / 28 — No Item Name Available
ManufacturerRtx Corporation Dba Pratt & Whitney Div Pratt &whitney
StatusACTIVE
General Characteristics Item DescriptionGRAPHITIC CARBON MATERIAL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
4720-00-817-7780 INTERCHANGEABLE
Hose,nonmetallic
Cross-Reference Index
Part NumberManufacturer
256096 PRIMARY Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA)
Related Parts
4720-00-817-7780INTERCHANGEABLE
HOSE,NONMETALLIC

Frequently Asked Questions

What is NSN 2840-01-020-8686?

NSN 2840-01-020-8686 is a Carbon Seal,engine, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 2840 (No Item Name Available). Status: active.

What are the part numbers for NSN 2840-01-020-8686?

NSN 2840-01-020-8686 has 1 cross-referenced part number: 256096 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).

What NSN replaces 2840-01-020-8686?

There is 1 known substitute for 2840-01-020-8686: 4720-00-817-7780. Verify interchangeability with system specifications before substitution.

What are the specifications of 256096?

Key specifications for 256096: General Characteristics Item Description: GRAPHITIC CARBON MATERIAL. 1 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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