PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MILC3098-3Crystal Unit,quartz

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 5955-00-686-7230 · FSC 5955 · No Item Name Available
Verified by PartsTable
NSN 5955-00-686-7230 — this item is cataloged by the U.S. Government under National Stock Number 5955-00-686-7230. Primary manufacturer part number: MILC3098-3.
Features
  • Crystal Unit,quartz — FSC 5955
  • Body Width: 0.725 INCHES MAXIMUM IN
  • Center to Center Distance Between Terminals: 0.478 INCHES MINIMUM AND 0.494 INCHES MAXIMUM IN
  • Style Designator: OVAL BODY, PIN TERMINALS
  • Body Thickness: 0.317 INCHES MAXIMUM IN
  • Equivalent Resistance Value in Ohms: 290.0 NOMINAL
  • Test Data Document: 81349-MILC3098 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.).
  • Shunt Capacitance in Picofarads: 7.0 MAXIMUM
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Crystal Unit,quartz, cataloged under National Stock Number 5955-00-686-7230, 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 18 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5955-00-686-7230
Primary Part NumberMILC3098-3
Item NameCrystal Unit,quartz
FSC / FSG5955 / 59 — No Item Name Available
ManufacturerMilitary Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
StatusACTIVE
Body Width0.725 INCHES MAXIMUM IN
Center to Center Distance Between Terminals0.478 INCHES MINIMUM AND 0.494 INCHES MAXIMUM IN
Style DesignatorOVAL BODY, PIN TERMINALS
Body Thickness0.317 INCHES MAXIMUM IN
Equivalent Resistance Value in Ohms290.0 NOMINAL
Test Data Document81349-MILC3098 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.).
Shunt Capacitance in Picofarads7.0 MAXIMUM
Terminal Length0.223 INCHES MINIMUM AND 0.248 INCHES MAXIMUM IN
Drive Level Rating8.0 MILLIWATTS MINIMUM AND 12.0 MILLIWATTS MAXIMUM
Terminal Diameter0.048 INCHES MINIMUM AND 0.052 INCHES MAXIMUM IN
Operating Temp Range-55.0 TO 105.0 CELSIUS DEGC
Circuit ResonanceANTIRESONANCE
Body Length0.775 INCHES MAXIMUM IN
Load Capacitance in Picofarads32.0 NOMINAL AND 31.5 MINIMUM AND 32.5 MAXIMUM
Mode of OscillationFUNDAMENTAL
Frequency Tolerance for Operating Temp in Percent-0.005 TO 0.005
Specified Frequency1.945 MEGAHERTZ
Overall Thickness0.352 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
5955-00-084-8503A-411-102-A INTERCHANGEABLE
Crystal Unit,quartz
Bae Systems Information and Electronic Systems Integration Inc. Dba Bae Systems
5955-00-685-8698 INTERCHANGEABLE
Crystal Unit,quartz
5955-00-686-7228 INTERCHANGEABLE
Crystal Unit,quartz
Cross-Reference Index
Part NumberManufacturer
MILC3098-3 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
CR-18/U1.945000MHZ Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
BH6A Bliley Technologies Inc (USA)
290-7543-00 Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems (USA)
Related Parts
5955-00-084-8503INTERCHANGEABLE
CRYSTAL UNIT,QUARTZ
A-411-102-A
5955-00-685-8698INTERCHANGEABLE
CRYSTAL UNIT,QUARTZ
5955-00-686-7228INTERCHANGEABLE
CRYSTAL UNIT,QUARTZ

Frequently Asked Questions

What is NSN 5955-00-686-7230?

NSN 5955-00-686-7230 is a Crystal Unit,quartz, 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 5955-00-686-7230?

NSN 5955-00-686-7230 has 4 cross-referenced part numbers: MILC3098-3 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), CR-18/U1.945000MHZ (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), BH6A (Bliley Technologies Inc), 290-7543-00 (Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems).

What NSN replaces 5955-00-686-7230?

There are 3 known substitutes for 5955-00-686-7230: 5955-00-084-8503, 5955-00-685-8698, 5955-00-686-7228. Verify interchangeability with system specifications before substitution.

What are the specifications of MILC3098-3?

Key specifications for MILC3098-3: Body Width: 0.725 INCHES MAXIMUM IN; Center to Center Distance Between Terminals: 0.478 INCHES MINIMUM AND 0.494 INCHES MAXIMUM IN; Style Designator: OVAL BODY, PIN TERMINALS; Overall Width: 0.757 INCHES MAXIMUM IN. 20 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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