PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

5303BPlug-in Unit,electrical-Electron

Keysight Technologies Inc · NSN 6625-00-321-5175 · FSC 6625 · No Item Name Available
Verified by PartsTable
NSN 6625-00-321-5175 — this item is cataloged by the U.S. Government under National Stock Number 6625-00-321-5175. Primary manufacturer part number: 5303B.
Features
  • Plug-in Unit,electrical-Electron — FSC 6625
  • Unit Type: FREQUENCY COUNTER
  • Unit Type: FREQUENCY COUNTER
  • 4 verified cross-references
  • Primary manufacturer: Keysight Technologies Inc
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Plug-in Unit,electrical-Electron, cataloged under National Stock Number 6625-00-321-5175, is classified within Federal Supply Class 6625 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Keysight Technologies Inc. Government technical data includes 2 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6625-00-321-5175
Primary Part Number5303B
Item NamePlug-in Unit,electrical-Electron
FSC / FSG6625 / 66 — No Item Name Available
ManufacturerKeysight Technologies Inc
StatusACTIVE
Unit TypeFREQUENCY COUNTER
Unit TypeFREQUENCY COUNTER
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Weight0.9900 lbs
Cube0.5682 cu ft
Verified Substitutes 2
4310-00-978-081917001 INTERCHANGEABLE
Breather
Falls Filtration Technologies, Inc.
6508-01-380-77165303B INTERCHANGEABLE
Protective Gel,skin Care
C. R. Bard, Inc.
Cross-Reference Index
Part NumberManufacturer
421-7437 Nimikkeistokeskus Ncb Finland (FIN)
5303B Keysight Technologies, Inc. (USA)
5303B Hewlett-Packard Company Dba HP (USA)
5303B PRIMARY Keysight Technologies Inc (USA)
Related Parts
4310-00-978-0819INTERCHANGEABLE
BREATHER
17001
6508-01-380-7716INTERCHANGEABLE
PROTECTIVE GEL,SKIN CARE
5303B

Frequently Asked Questions

What is NSN 6625-00-321-5175?

NSN 6625-00-321-5175 is a Plug-in Unit,electrical-Electron, manufactured by Keysight Technologies Inc, classified under FSC 6625 (No Item Name Available). Status: active.

What are the part numbers for NSN 6625-00-321-5175?

NSN 6625-00-321-5175 has 4 cross-referenced part numbers: 421-7437 (Nimikkeistokeskus Ncb Finland), 5303B (Keysight Technologies, Inc.), 5303B (Hewlett-Packard Company Dba HP), 5303B (Keysight Technologies Inc).

What NSN replaces 6625-00-321-5175?

There are 2 known substitutes for 6625-00-321-5175: 4310-00-978-0819, 6508-01-380-7716. Verify interchangeability with system specifications before substitution.

What are the specifications of 5303B?

Key specifications for 5303B: Unit Type: FREQUENCY COUNTER; Overall Width: 6.250 INCHES NOMINAL IN; Overall Height: 1.750 INCHES NOMINAL IN; Overall Length: 9.750 INCHES NOMINAL IN. 8 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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