PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

A4481ADisk,clutch,vehicular

Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic · NSN 2520-00-471-0039 · FSC 2520 · No Item Name Available
Verified by PartsTable
NSN 2520-00-471-0039 — this item is cataloged by the U.S. Government under National Stock Number 2520-00-471-0039. Primary manufacturer part number: A4481A.
Features
  • Disk,clutch,vehicular — FSC 2520
  • Disk Material: STEEL
  • Teeth Quantity Per Disk: 40
  • Disk Type: INTERNAL TEETH
  • Flexibility: RIGID
  • Design Type: WET
  • Outside Diameter: 6.000 INCHES NOMINAL IN
  • 2 verified cross-references
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Disk,clutch,vehicular, cataloged under National Stock Number 2520-00-471-0039, 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 6 verified specifications, 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. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN2520-00-471-0039
Primary Part NumberA4481A
Item NameDisk,clutch,vehicular
FSC / FSG2520 / 25 — No Item Name Available
ManufacturerTwin Disc, Incorporated Dba Twin Disc Mid-Atlantic
StatusACTIVE
Disk MaterialSTEEL
Teeth Quantity Per Disk40
Disk TypeINTERNAL TEETH
FlexibilityRIGID
Design TypeWET
Outside Diameter6.000 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
5340-00-193-361992204 INTERCHANGEABLE
Strap,retaining
Telemechanics Inc
3120-00-439-0075 INTERCHANGEABLE
Bearing,sleeve
2805-00-497-688834310 INTERCHANGEABLE
Insert,engine Valve Seat
Safeguard Powertech Systems
3110-00-516-5289203TF INTERCHANGEABLE
Bearing,ball,annular
Fag Bearings Corporation
4310-00-580-7569N34310 INTERCHANGEABLE
Ring,piston
Leslie Controls, Inc. Dba Leslie Controls Inc
5306-00-806-851234310 INTERCHANGEABLE
Bolt,u
Daniel Edward W Co
3130-01-342-2801PPB10-5/8 INTERCHANGEABLE
Bearing Unit,ball
Altra Industrial Motion Corp.
Cross-Reference Index
Part NumberManufacturer
A4481A PRIMARY Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic (USA)
34310 Tiffin Parts, L.l.c. Div Subsidiary of Pettibone Corp. (USA)
Related Parts
5340-00-193-3619INTERCHANGEABLE
STRAP,RETAINING
92204
3120-00-439-0075INTERCHANGEABLE
BEARING,SLEEVE
2805-00-497-6888INTERCHANGEABLE
INSERT,ENGINE VALVE SEAT
34310
3110-00-516-5289INTERCHANGEABLE
BEARING,BALL,ANNULAR
203TF
4310-00-580-7569INTERCHANGEABLE
RING,PISTON
N34310
5306-00-806-8512INTERCHANGEABLE
BOLT,U
34310
3130-01-342-2801INTERCHANGEABLE
BEARING UNIT,BALL
PPB10-5/8

Frequently Asked Questions

What is NSN 2520-00-471-0039?

NSN 2520-00-471-0039 is a Disk,clutch,vehicular, 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 2520-00-471-0039?

NSN 2520-00-471-0039 has 2 cross-referenced part numbers: A4481A (Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic), 34310 (Tiffin Parts, L.l.c. Div Subsidiary of Pettibone Corp.).

What NSN replaces 2520-00-471-0039?

There are 7 known substitutes for 2520-00-471-0039: 5340-00-193-3619, 3120-00-439-0075, 2805-00-497-6888 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of A4481A?

Key specifications for A4481A: Disk Material: STEEL; Teeth Quantity Per Disk: 40; Disk Type: INTERNAL TEETH; Flexibility: RIGID. 6 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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