PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

4B9000Piston,hydraulic Brake

Caterpillar Inc Div Caterpillar Defense · NSN 2530-00-521-4978 · FSC 2530 · No Item Name Available
Verified by PartsTable
NSN 2530-00-521-4978 — this item is cataloged by the U.S. Government under National Stock Number 2530-00-521-4978. Primary manufacturer part number: 4B9000.
Features
  • Piston,hydraulic Brake — FSC 2530
  • 31 verified cross-references
  • Primary manufacturer: Caterpillar Inc Div Caterpillar Defense
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Piston,hydraulic Brake, cataloged under National Stock Number 2530-00-521-4978, is classified within Federal Supply Class 2530 (No Item Name Available) of the Vehicular Equipment Components group. The primary manufacturer of record is Caterpillar Inc Div Caterpillar Defense. This item has 31 commercial cross-references from 26 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Catalog Facts
Item NamePiston,hydraulic Brake
FSC / FSG2530 — No Item Name Available (FSG 25)
ManufacturersGeneral Motors Corp (CAGE 24617); Mack Trucks Inc Parts Opn (CAGE 76040); Federal Mogul Corp Sub Wagner Brake Moog Automotive Div (CAGE 63477); Wabco Construction and Mining Equipment Group Indianapolis Plant an American Standard Inc Co (CAGE 00447); Oshkosh Defense Llc (CAGE 75Q65)
Technical Specifications
ParameterValue
NSN2530-00-521-4978
Primary Part Number4B9000
Item NamePiston,hydraulic Brake
FSC / FSG2530 / 25 — No Item Name Available
ManufacturerCaterpillar Inc Div Caterpillar Defense
StatusCANCELLED
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5950-00-078-8437 INTERCHANGEABLE
Coil,radio Frequency
5210-00-189-951693824 INTERCHANGEABLE
Gage,gap Setting
Telemechanics Inc
5340-00-290-7231 INTERCHANGEABLE
Plug,protective,dust and Moistur
1560-00-350-0579H844-7 INTERCHANGEABLE
Keeper,cowl Door
Hartwell Corporation
4810-00-406-3337 INTERCHANGEABLE
Valve,solenoid
5330-00-562-2518093824 INTERCHANGEABLE
Seal,plain Encased
Mitsubishi Caterpillar Forklift America, Inc
5965-00-843-9957 INTERCHANGEABLE
Microphone Element
5330-01-101-8061C11884 INTERCHANGEABLE
Seal,plain Encased
Deere & Co
6515-01-276-4611292.12 INTERCHANGEABLE
Wire,bone
Depuy Synthes Sales Inc Dba Depuy Synthes Trauma Div Depuy Synthes Sales, Inc., D/b/a Depuy Synthes Trauma
5985-01-321-94981065585-23 INTERCHANGEABLE
Attenuator,fixed
Raytheon Company Dba Raytheon Co
Cross-Reference Index
Part NumberManufacturer
093824 General Motors Corp (USA)
11EHW18 Mack Trucks Inc Parts Opn (USA)
FC975F Federal Mogul Corp Sub Wagner Brake Moog Automotive Div (USA)
471701 Wabco Construction and Mining Equipment Group Indianapolis Plant an American Standard Inc Co (USA)
4WE9 Oshkosh Defense Llc (USA)
956626 Vme Americas Inc Sub of Vme Group N V (USA)
4WE9 Oshkosh Corp (USA)
956626 Clark Equipment Co (USA)
16488J Diamond Reo Truck Co (USA)
4B9000 PRIMARY Caterpillar Inc Div Caterpillar Defense (USA)
FC975 Federal Mogul Corp Sub Wagner Brake Moog Automotive Div (USA)
A282745 U S Army Tank Automotive Command Amsta-Im-Mm (USA)
F57802 PRIMARY Federal Mogul Corp Sub Wagner Brake Moog Automotive Div (USA)
A214978 U S Army Tank Automotive Command Amsta-Im-Mm (USA)
9TA0245 Volvo Trucks North America, Inc. Dba (foreign Parent Is Volvo Lastvagnar Ab, Goteborg, Sweden.) (USA)
FT10070 White Farm Equipment Co Sub of Tic Investment Inc (USA)
2CD259 Diamond Reo Truck Co (USA)
09-20952 Lift Parts Mfg Co Inc Div of Echlin Mfg Co the (USA)
11A2232 Napco International Llc Dba Napco International Inc (USA)
354652 White Motor Corp (USA)
Related Parts
5950-00-078-8437INTERCHANGEABLE
COIL,RADIO FREQUENCY
5210-00-189-9516INTERCHANGEABLE
GAGE,GAP SETTING
93824
5340-00-290-7231INTERCHANGEABLE
PLUG,PROTECTIVE,DUST AND MOISTUR
1560-00-350-0579INTERCHANGEABLE
KEEPER,COWL DOOR
H844-7
4810-00-406-3337INTERCHANGEABLE
VALVE,SOLENOID
5330-00-562-2518INTERCHANGEABLE
SEAL,PLAIN ENCASED
093824
5965-00-843-9957INTERCHANGEABLE
MICROPHONE ELEMENT
5330-01-101-8061INTERCHANGEABLE
SEAL,PLAIN ENCASED
C11884
6515-01-276-4611INTERCHANGEABLE
WIRE,BONE
292.12
5985-01-321-9498INTERCHANGEABLE
ATTENUATOR,FIXED
1065585-23
5950-01-342-4273INTERCHANGEABLE
TRANSFORMER,POWER
471701
4820-01-346-4122INTERCHANGEABLE
VALVE,FLOAT

Frequently Asked Questions

What is NSN 2530-00-521-4978?

NSN 2530-00-521-4978 is a Piston,hydraulic Brake, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 2530 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 2530-00-521-4978?

NSN 2530-00-521-4978 has 31 cross-referenced part numbers: 093824 (General Motors Corp), 11EHW18 (Mack Trucks Inc Parts Opn), FC975F (Federal Mogul Corp Sub Wagner Brake Moog Automotive Div), 471701 (Wabco Construction and Mining Equipment Group Indianapolis Plant an American Standard Inc Co), 4WE9 (Oshkosh Defense Llc) and 26 more.

What NSN replaces 2530-00-521-4978?

There are 12 known substitutes for 2530-00-521-4978: 5950-00-078-8437, 5210-00-189-9516, 5340-00-290-7231 and 9 more. Verify interchangeability with system specifications before substitution.

Is NSN 2530-00-521-4978 still in active supply?

NSN 2530-00-521-4978 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com