PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

4987585-9Retainer,output Shaft

Kalmar AC Inc · NSN 2520-00-057-2991 · FSC 2520 · No Item Name Available
Verified by PartsTable
NSN 2520-00-057-2991 — this item is cataloged by the U.S. Government under National Stock Number 2520-00-057-2991. Primary manufacturer part number: 4987585-9.
Features
  • Retainer,output Shaft — FSC 2520
  • General Characteristics Item Description: CAST IRON,CYLINDRICAL BODY W/INTEGRAL HEXAGON FLANGE,5.281 IN.ACROSS CORNERS,4.656 IN.ACROSS FLATS,1.875 IN.O/A LG IN
  • 3 verified cross-references
  • Primary manufacturer: Kalmar AC Inc
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Retainer,output Shaft, cataloged under National Stock Number 2520-00-057-2991, is classified within Federal Supply Class 2520 (No Item Name Available) of the Vehicular Equipment Components group. The primary manufacturer of record is Kalmar AC Inc. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN2520-00-057-2991
Primary Part Number4987585-9
Item NameRetainer,output Shaft
FSC / FSG2520 / 25 — No Item Name Available
ManufacturerKalmar AC Inc
StatusACTIVE
General Characteristics Item DescriptionCAST IRON,CYLINDRICAL BODY W/INTEGRAL HEXAGON FLANGE,5.281 IN.ACROSS CORNERS,4.656 IN.ACROSS FLATS,1.875 IN.O/A LG IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 10
5950-00-086-0249 INTERCHANGEABLE
Transformer,pulse
3110-00-117-0759 INTERCHANGEABLE
Bearing,roller,thrust
5120-00-143-7810T127 INTERCHANGEABLE
Puller,mechanical
Hamilton Sundstrand Corporation
2920-00-524-9574YD213K INTERCHANGEABLE
Lead,ignition,engine
Wisconsin Motors, Llc
3439-00-542-0457 INTERCHANGEABLE
Tip,electric Soldering Iron
2520-01-023-2256T127 INTERCHANGEABLE
Parts Kit,mechanical Transmissio
New Venture Gear Inc New Process Gear Div
3439-01-084-617387 INTERCHANGEABLE
Tip,electric Soldering Iron
Lockheed Martin Corporation Div Lockheed Martin Aeronautics Company
9330-01-201-0658P5434-1-1 INTERCHANGEABLE
Tubing,plastic,spiral Wrap
Lockheed Martin Corporation Div Lockheed Martin Aeronautics Company
5136-01-520-6153FRS T127 INTERCHANGEABLE
Tap,thread Cutting
Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc
9330-01-669-4875 INTERCHANGEABLE
Tubing,plastic,spiral Wrap
Cross-Reference Index
Part NumberManufacturer
4987585-9 PRIMARY Kalmar AC Inc (USA)
T12T Liberty Ventures Inti, Llc (USA)
T12-7 Liberty Ventures Inti, Llc (USA)
Related Parts
5950-00-086-0249INTERCHANGEABLE
TRANSFORMER,PULSE
3110-00-117-0759INTERCHANGEABLE
BEARING,ROLLER,THRUST
5120-00-143-7810INTERCHANGEABLE
PULLER,MECHANICAL
T127
2920-00-524-9574INTERCHANGEABLE
LEAD,IGNITION,ENGINE
YD213K
3439-00-542-0457INTERCHANGEABLE
TIP,ELECTRIC SOLDERING IRON
2520-01-023-2256INTERCHANGEABLE
PARTS KIT,MECHANICAL TRANSMISSIO
T127
3439-01-084-6173INTERCHANGEABLE
TIP,ELECTRIC SOLDERING IRON
87
9330-01-201-0658INTERCHANGEABLE
TUBING,PLASTIC,SPIRAL WRAP
P5434-1-1
5136-01-520-6153INTERCHANGEABLE
TAP,THREAD CUTTING
FRS T127
9330-01-669-4875INTERCHANGEABLE
TUBING,PLASTIC,SPIRAL WRAP

Frequently Asked Questions

What is NSN 2520-00-057-2991?

NSN 2520-00-057-2991 is a Retainer,output Shaft, manufactured by Kalmar AC Inc, classified under FSC 2520 (No Item Name Available). Status: active.

What are the part numbers for NSN 2520-00-057-2991?

NSN 2520-00-057-2991 has 3 cross-referenced part numbers: 4987585-9 (Kalmar AC Inc), T12T (Liberty Ventures Inti, Llc), T12-7 (Liberty Ventures Inti, Llc).

What NSN replaces 2520-00-057-2991?

There are 10 known substitutes for 2520-00-057-2991: 5950-00-086-0249, 3110-00-117-0759, 5120-00-143-7810 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 4987585-9?

Key specifications for 4987585-9: General Characteristics Item Description: CAST IRON,CYLINDRICAL BODY W/INTEGRAL HEXAGON FLANGE,5.281 IN.ACROSS CORNERS,4.656 IN.ACROSS FLATS,1.875 IN.O/A LG IN; End Item Identification: 3930-00-489-0263. 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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