PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

HD.20Disk Drive Unit

Texas Microsystems Inc · NSN 7025-01-377-2405 · FSC 7025 · No Item Name Available
Verified by PartsTable
NSN 7025-01-377-2405 — this item is cataloged by the U.S. Government under National Stock Number 7025-01-377-2405. Primary manufacturer part number: HD.20.
Features
  • Disk Drive Unit — FSC 7025
  • Drive Size: 3.50
  • Operating Temp Range: +0.0 TO 55.0 CELSIUS DEGC
  • Design Type: HARD CARD
  • Power Source: EXTERNAL
  • Drive Quantity: 1
  • Unit Design: RACK MOUNTED
  • Data Storage Capacity: 20.000 MEGABYTES
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Disk Drive Unit, cataloged under National Stock Number 7025-01-377-2405, is classified within Federal Supply Class 7025 (No Item Name Available) of the General Purpose ADP Equipment group. The primary manufacturer of record is Texas Microsystems Inc. Government technical data includes 14 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN7025-01-377-2405
Primary Part NumberHD.20
Item NameDisk Drive Unit
FSC / FSG7025 / 70 — No Item Name Available
ManufacturerTexas Microsystems Inc
StatusACTIVE
Drive Size3.50
Operating Temp Range+0.0 TO 55.0 CELSIUS DEGC
Design TypeHARD CARD
Power SourceEXTERNAL
Drive Quantity1
Unit DesignRACK MOUNTED
Data Storage Capacity20.000 MEGABYTES
Drive Size3.50
Operating Temp Range+0.0 TO 55.0 CELSIUS DEGC
Design TypeHARD CARD
Power SourceEXTERNAL
Drive Quantity1
Unit DesignRACK MOUNTED
Data Storage Capacity20.000 MEGABYTES
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Shelf Life Code0
Criticality CodeN
Unit of IssueEA
SMR CodeJN
Verified Substitutes 6
4730-00-160-31503340004 INTERCHANGEABLE
Strainer Element,sediment
Ed Etnyre & Co
2530-00-296-0855037340 INTERCHANGEABLE
Boot,vehicular Components
Caterpillar Inc Div Caterpillar Defense
7435-01-167-8708HD20 INTERCHANGEABLE
Disk,20mbyte Hard-Winchester
Cromemco Inc
3416-01-209-8480D6329 INTERCHANGEABLE
Shifting Shoe
Phoenix, Inc
9330-01-334-2336SKA20-R INTERCHANGEABLE
Spill Kit,powersorb
Sorbent Products Co Inc
5985-01-585-8010 INTERCHANGEABLE
Antenna Group
Cross-Reference Index
Part NumberManufacturer
HD.20 PRIMARY Texas Microsystems Inc (USA)
Related Parts
4730-00-160-3150INTERCHANGEABLE
STRAINER ELEMENT,SEDIMENT
3340004
2530-00-296-0855INTERCHANGEABLE
BOOT,VEHICULAR COMPONENTS
037340
7435-01-167-8708INTERCHANGEABLE
DISK,20MBYTE HARD-WINCHESTER
HD20
3416-01-209-8480INTERCHANGEABLE
SHIFTING SHOE
D6329
9330-01-334-2336INTERCHANGEABLE
SPILL KIT,POWERSORB
SKA20-R
5985-01-585-8010INTERCHANGEABLE
ANTENNA GROUP

Frequently Asked Questions

What is NSN 7025-01-377-2405?

NSN 7025-01-377-2405 is a Disk Drive Unit, manufactured by Texas Microsystems Inc, classified under FSC 7025 (No Item Name Available). Status: active.

What are the part numbers for NSN 7025-01-377-2405?

NSN 7025-01-377-2405 has 1 cross-referenced part number: HD.20 (Texas Microsystems Inc).

What NSN replaces 7025-01-377-2405?

There are 6 known substitutes for 7025-01-377-2405: 4730-00-160-3150, 2530-00-296-0855, 7435-01-167-8708 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of HD.20?

Key specifications for HD.20: Drive Size: 3.50; Operating Temp Range: +0.0 TO 55.0 CELSIUS DEGC; Design Type: HARD CARD; Power Source: EXTERNAL. 14 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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