PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MODEL NO 8139Disk Drive Unit

Encore Real Time Computing Ltd · NSN 7025-01-430-4999 · FSC 7025 · No Item Name Available
Verified by PartsTable
NSN 7025-01-430-4999 — this item is cataloged by the U.S. Government under National Stock Number 7025-01-430-4999. Primary manufacturer part number: MODEL NO 8139.
Features
  • Disk Drive Unit — FSC 7025
  • Design Type: DISK CARTRIDGE
  • Unpackaged Unit Weight: 60.000 POUNDS LBS
  • Operating Temp Range: +50.0 TO 114.0 FAHRENHEIT DEGF
  • Data Storage Capacity: 82.00 MEGABYTES
  • Drive Quantity: 1
  • Transfer Rate in Megabytes Per Second: 1.2
  • Voltage in Volts and Current Type: 120.0 AC
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Disk Drive Unit, cataloged under National Stock Number 7025-01-430-4999, is classified within Federal Supply Class 7025 (No Item Name Available) of the General Purpose ADP Equipment group. The primary manufacturer of record is Encore Real Time Computing Ltd. Government technical data includes 22 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. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN7025-01-430-4999
Primary Part NumberMODEL NO 8139
Item NameDisk Drive Unit
FSC / FSG7025 / 70 — No Item Name Available
ManufacturerEncore Real Time Computing Ltd
StatusACTIVE
Design TypeDISK CARTRIDGE
Unpackaged Unit Weight60.000 POUNDS LBS
Operating Temp Range+50.0 TO 114.0 FAHRENHEIT DEGF
Data Storage Capacity82.00 MEGABYTES
Drive Quantity1
Transfer Rate in Megabytes Per Second1.2
Voltage in Volts and Current Type120.0 AC
Unit DesignRACK MOUNTED
Drive Size9.00
Power SourceEXTERNAL
Tracks Per Inch550.0
Drive Quantity1
Design TypeDISK CARTRIDGE
Unpackaged Unit Weight60.000 POUNDS LBS
Operating Temp Range+50.0 TO 114.0 FAHRENHEIT DEGF
Data Storage Capacity82.00 MEGABYTES
Transfer Rate in Megabytes Per Second1.2
Voltage in Volts and Current Type120.0 AC
Unit DesignRACK MOUNTED
Drive Size9.00
Power SourceEXTERNAL
Tracks Per Inch550.0
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 10
2530-00-106-55688139 INTERCHANGEABLE
Lock,axle
Tiffin Parts, L.l.c. Div Subsidiary of Pettibone Corp.
4730-00-545-07840031120-030 INTERCHANGEABLE
Elbow,pipe
Cleveland Service Center
6125-00-734-61288139-1 INTERCHANGEABLE
Rotor Assy,motor-Ge
Kurz & Root Generator Company, Llc
5962-01-138-9819 INTERCHANGEABLE
Microcircuit,linear
5360-01-190-17908 139 INTERCHANGEABLE
Spring,helical,compression
Eaton Aerospace Llc Dba Sterer Engineering Div Valve & Actuator
8030-01-218-4344 INTERCHANGEABLE
Potting Compound
5915-01-232-85785883578 INTERCHANGEABLE
Network,circuit Protection
Naval Sea Systems Command
4820-01-329-56828139 INTERCHANGEABLE
Seat,valve
Tescom Corp Dba Tescom Div Tescom
5340-01-624-11728139 INTERCHANGEABLE
Fairlead Support
Teledyne Flir Unmanned Ground Systems, Inc
4820-01-634-0106 INTERCHANGEABLE
Seat,valve
Cross-Reference Index
Part NumberManufacturer
MODEL NO 8139 Encore Real Time Computing Ltd (GBR)
8139 Compro Computer Services, Inc. Dba Compro (USA)
Related Parts
2530-00-106-5568INTERCHANGEABLE
LOCK,AXLE
8139
4730-00-545-0784INTERCHANGEABLE
ELBOW,PIPE
0031120-030
6125-00-734-6128INTERCHANGEABLE
ROTOR ASSY,MOTOR-GE
8139-1
5962-01-138-9819INTERCHANGEABLE
MICROCIRCUIT,LINEAR
5360-01-190-1790INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
8 139
8030-01-218-4344INTERCHANGEABLE
POTTING COMPOUND
5915-01-232-8578INTERCHANGEABLE
NETWORK,CIRCUIT PROTECTION
5883578
4820-01-329-5682INTERCHANGEABLE
SEAT,VALVE
8139
5340-01-624-1172INTERCHANGEABLE
FAIRLEAD SUPPORT
8139
4820-01-634-0106INTERCHANGEABLE
SEAT,VALVE

Frequently Asked Questions

What is NSN 7025-01-430-4999?

NSN 7025-01-430-4999 is a Disk Drive Unit, manufactured by Encore Real Time Computing Ltd, classified under FSC 7025 (No Item Name Available). Status: active.

What are the part numbers for NSN 7025-01-430-4999?

NSN 7025-01-430-4999 has 2 cross-referenced part numbers: MODEL NO 8139 (Encore Real Time Computing Ltd), 8139 (Compro Computer Services, Inc. Dba Compro).

What NSN replaces 7025-01-430-4999?

There are 10 known substitutes for 7025-01-430-4999: 2530-00-106-5568, 4730-00-545-0784, 6125-00-734-6128 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MODEL NO 8139?

Key specifications for MODEL NO 8139: Design Type: DISK CARTRIDGE; Unpackaged Unit Weight: 60.000 POUNDS LBS; Operating Temp Range: +50.0 TO 114.0 FAHRENHEIT DEGF; Overall Height: 10.200 INCHES NOMINAL IN. 26 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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