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Technical Data Sheet
PartsTable / COMPONENT / G21-12
G21-12 ✓ Verified by PartsTable
Vertiv · COMPONENT
WHAT YOU NEED TO KNOW
Verify manufacturer and server generation compatibility Check if Option PN or Spare PN — same part, different channel
Confirm exact part number — similar PNs may be different parts
PRODUCT OVERVIEW

Basic rPDUs deliver reliable power to critical IT equipment within a rack or cabinet. Key specifications include material: STEEL COMP 316 FLOW CONTROL DEVICE, body_width: 0.402 INCHES MAXIMUM IN, body_length: 0.530 INCHES MAXIMUM IN, bonnet_type: PACKING RETAINING, overall_width: 0.435 INCHES MAXIMUM IN, body_thickness: 0.150 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5955-01-179-8636, indicating validated use in U.S.

government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels. Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
G21-12
NSN: 5955-01-179-8636
FSC: 5955
CAGE: 00136 — MICROSEMI CORP. - HIGH PERFORMANCE TIMING DBA VECTRON INTERNATIONAL- CANCELLED (USA)
SPECIFICATIONS
materialSTEEL COMP 316 FLOW CONTROL DEVICE
body_width0.402 INCHES MAXIMUM IN
body_length0.530 INCHES MAXIMUM IN
bonnet_typePACKING RETAINING
overall_width0.435 INCHES MAXIMUM IN
body_thickness0.150 INCHES MAXIMUM IN
overall_length0.778 INCHES MAXIMUM IN
connection_typeTHREADED INTERNAL PIPE ALL ENDS
terminal_length0.223 INCHES MINIMUM AND 0.248 INCHES MAXIMUM IN
connection_stylePLAIN,OPTIONAL END(PIPE) ALL ENDS
style_designatorSTRAIGHT THRU
thread_directionRIGHT-HAND ALL ENDS
NSN5955-01-179-8636
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR MFR: Vertiv CRYSTAL UNIT,QUARTZ TITLE COMPONENT PN G21-12 MFR Vertiv CRYSTAL UNIT,QUARTZ
KEY FEATURES
•
BODY THICKNESS: 0.150 INCHES MAXIMUM IN
•
TERMINAL DIAMETER: 0.038 INCHES MINIMUM AND 0.042 INCHES MAXIMUM IN
•
CENTER TO CENTER DISTANCE BETWEEN TERMINALS: 0.184 INCHES MINIMUM AND 0.200 INCHES MAXIMUM IN
•
DRIVE LEVEL RATING: 1.6 MILLIWATTS MINIMUM AND 2.4 MILLIWATTS MAXIMUM
•
FREQUENCY TOLERANCE FOR OPERATING TEMP IN PERCENT: -0.006 TO 0.006
•
STYLE DESIGNATOR: OVAL BODY, PIN TERMINALS
•
TEST DATA DOCUMENT: 81349-MIL-C-3098 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.).
•
EQUIVALENT RESISTANCE VALUE IN OHMS: 20.0 MINIMUM AND 60.0 MAXIMUM
TECHNICAL CHARACTERISTICS (FLIS)
BODY THICKNESS0.150 INCHES MAXIMUM IN
TERMINAL DIAMETER0.038 INCHES MINIMUM AND 0.042 INCHES MAXIMUM IN
CENTER TO CENTER DISTANCE BETWEEN TERMINALS0.184 INCHES MINIMUM AND 0.200 INCHES MAXIMUM IN
DRIVE LEVEL RATING1.6 MILLIWATTS MINIMUM AND 2.4 MILLIWATTS MAXIMUM
FREQUENCY TOLERANCE FOR OPERATING TEMP IN PERCENT-0.006 TO 0.006
STYLE DESIGNATOROVAL BODY, PIN TERMINALS
TEST DATA DOCUMENT81349-MIL-C-3098 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.).
EQUIVALENT RESISTANCE VALUE IN OHMS20.0 MINIMUM AND 60.0 MAXIMUM
SPECIFICATION/STANDARD DATA81349-MIL-C-3098/112 GOVERNMENT SPECIFICATION
OVERALL LENGTH0.778 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 16
CR133/U100M1000Interchangeable
interchangeable cross-reference
interchangeable
8537694-1Interchangeable
interchangeable cross-reference
interchangeable
G21-1Interchangeable
interchangeable cross-reference
interchangeable
CR133/U103M6000Interchangeable
interchangeable cross-reference
interchangeable
MIL-C-3098/112Interchangeable
interchangeable cross-reference
interchangeable
C5.45-3282Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is G21-12?
G21-12 is a CRYSTAL UNIT,QUARTZ manufactured by Vertiv.
What parts can replace G21-12?
There are 16 known substitutes for G21-12: CR133/U100M1000, 8537694-1, G21-1 and 13 more. Substitute compatibility should be verified for your specific system.
Is G21-12 still available?
G21-12 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026