PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

HC-25/UHolder,crystal Unit

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 5955-01-301-1622 · FSC 5955 · No Item Name Available
Verified by PartsTable
NSN 5955-01-301-1622 — this item is cataloged by the U.S. Government under National Stock Number 5955-01-301-1622. Primary manufacturer part number: HC-25/U.
Features
  • Holder,crystal Unit — FSC 5955
  • Material: COPPER ALLOY
  • Specification/standard Data: 81349-MIL-H-10056/11 GOVERNMENT SPECIFICATION
  • Material Document and Classification: QQ-C-585 FED SPEC SINGLE MATERIAL RESPONSE
  • Test Data Document: 81349-MIL-H-10056 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
  • 3 verified cross-references
  • Primary manufacturer: Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Applications
  • Applications requiring Copper Alloy construction
General Description

The Holder,crystal Unit, cataloged under National Stock Number 5955-01-301-1622, is classified within Federal Supply Class 5955 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M. Government technical data includes 4 verified specifications, 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. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5955-01-301-1622
Primary Part NumberHC-25/U
Item NameHolder,crystal Unit
FSC / FSG5955 / 59 — No Item Name Available
ManufacturerMilitary Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
StatusACTIVE
MaterialCOPPER ALLOY
Specification/standard Data81349-MIL-H-10056/11 GOVERNMENT SPECIFICATION
Material Document and ClassificationQQ-C-585 FED SPEC SINGLE MATERIAL RESPONSE
Test Data Document81349-MIL-H-10056 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
5330-00-037-9351 INTERCHANGEABLE
Gasket
2990-00-438-155111013-12 INTERCHANGEABLE
Cap Assembly,protective,muffler-
Systems Protection Group Us Llc
3020-01-364-6134 INTERCHANGEABLE
Chain,cable
5330-01-393-9080 INTERCHANGEABLE
Gasket
Cross-Reference Index
Part NumberManufacturer
HC-25/U Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MIL-H-10056/11 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
364001 Datron World Communications, Inc. (USA)
Related Parts
5330-00-037-9351INTERCHANGEABLE
GASKET
2990-00-438-1551INTERCHANGEABLE
CAP ASSEMBLY,PROTECTIVE,MUFFLER-
11013-12
3020-01-364-6134INTERCHANGEABLE
CHAIN,CABLE
5330-01-393-9080INTERCHANGEABLE
GASKET

Frequently Asked Questions

What is NSN 5955-01-301-1622?

NSN 5955-01-301-1622 is a Holder,crystal Unit, manufactured by Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 5955 (No Item Name Available). Status: active.

What are the part numbers for NSN 5955-01-301-1622?

NSN 5955-01-301-1622 has 3 cross-referenced part numbers: HC-25/U (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MIL-H-10056/11 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), 364001 (Datron World Communications, Inc.).

What NSN replaces 5955-01-301-1622?

There are 4 known substitutes for 5955-01-301-1622: 5330-00-037-9351, 2990-00-438-1551, 3020-01-364-6134 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of HC-25/U?

Key specifications for HC-25/U: Material: COPPER ALLOY; Specification/standard Data: 81349-MIL-H-10056/11 GOVERNMENT SPECIFICATION; Material Document and Classification: QQ-C-585 FED SPEC SINGLE MATERIAL RESPONSE; Test Data Document: 81349-MIL-H-10056 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).. 4 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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