PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

4879Shaft,clutch

Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic · NSN 2520-00-025-1256 · FSC 2520 · No Item Name Available
Verified by PartsTable
NSN 2520-00-025-1256 — this item is cataloged by the U.S. Government under National Stock Number 2520-00-025-1256. Primary manufacturer part number: 4879.
Features
  • Shaft,clutch — FSC 2520
  • General Characteristics Item Description: IRREGULAR SHAPE WITH 1 INLET
  • 2 verified cross-references
  • Primary manufacturer: Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Shaft,clutch, cataloged under National Stock Number 2520-00-025-1256, is classified within Federal Supply Class 2520 (No Item Name Available) of the Vehicular Equipment Components group. The primary manufacturer of record is Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN2520-00-025-1256
Primary Part Number4879
Item NameShaft,clutch
FSC / FSG2520 / 25 — No Item Name Available
ManufacturerTwin Disc, Incorporated Dba Twin Disc Mid-Atlantic
StatusACTIVE
General Characteristics Item DescriptionIRREGULAR SHAPE WITH 1 INLET
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
5342-00-013-3651DS-934377 INTERCHANGEABLE
Clip,nutating Plate
Eaton Aerospace, Llc Dba Jackson South
5940-00-143-4771MS25036-103 INTERCHANGEABLE
Terminal,lug
Sae International Dba Sae International
5950-00-147-96762678621 INTERCHANGEABLE
Transformer,audio Frequency
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
5950-00-228-1449 INTERCHANGEABLE
Coil,radio Frequency
5340-00-515-17114905-25 INTERCHANGEABLE
Latch,rim
Eastern Co Div Eberhard Manufacturing
5330-00-843-95164879 INTERCHANGEABLE
Seal,plain Encased
Eaton Corporation Dba Eaton Inoac
5120-01-073-5190GS15946-1 INTERCHANGEABLE
Tool,retainer Simulator
Hamilton Sundstrand Corporation Dba Collins Aerospace
4820-01-275-06174879 INTERCHANGEABLE
Piston,valve
Coffin Turbo Pump Inc
5965-01-310-56884879 INTERCHANGEABLE
Microphone Element
Hose-Mccann Telephone Co, Inc
Cross-Reference Index
Part NumberManufacturer
4879 PRIMARY Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic (USA)
37333D PRIMARY Navistar Intl Corp Melrose Park Engine Plant Location /melrose Park/ (USA)
Related Parts
5342-00-013-3651INTERCHANGEABLE
CLIP,NUTATING PLATE
DS-934377
5940-00-143-4771INTERCHANGEABLE
TERMINAL,LUG
MS25036-103
5950-00-147-9676INTERCHANGEABLE
TRANSFORMER,AUDIO FREQUENCY
2678621
5950-00-228-1449INTERCHANGEABLE
COIL,RADIO FREQUENCY
5340-00-515-1711INTERCHANGEABLE
LATCH,RIM
4905-25
5330-00-843-9516INTERCHANGEABLE
SEAL,PLAIN ENCASED
4879
5120-01-073-5190INTERCHANGEABLE
TOOL,RETAINER SIMULATOR
GS15946-1
4820-01-275-0617INTERCHANGEABLE
PISTON,VALVE
4879
5965-01-310-5688INTERCHANGEABLE
MICROPHONE ELEMENT
4879

Frequently Asked Questions

What is NSN 2520-00-025-1256?

NSN 2520-00-025-1256 is a Shaft,clutch, manufactured by Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic, classified under FSC 2520 (No Item Name Available). Status: active.

What are the part numbers for NSN 2520-00-025-1256?

NSN 2520-00-025-1256 has 2 cross-referenced part numbers: 4879 (Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic), 37333D (Navistar Intl Corp Melrose Park Engine Plant Location /melrose Park/).

What NSN replaces 2520-00-025-1256?

There are 9 known substitutes for 2520-00-025-1256: 5342-00-013-3651, 5940-00-143-4771, 5950-00-147-9676 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 4879?

Key specifications for 4879: General Characteristics Item Description: IRREGULAR SHAPE WITH 1 INLET; End Item Identification: 3895-00-057-8715. 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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