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Technical Data Sheet
PartsTable / MRO / 4321B-4
4321B-4 ✓ Verified by PartsTable
— · MRO · MRO_GENERAL
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

The 4321B-4 is a the manufacturer industrial component. Key specifications include power_rating: 10.0 WATTS AVERAGE, overall_width: 2.380 INCHES NOMINAL IN, overall_height: 0.400 INCHES NOMINAL IN, overall_length: 2.970 INCHES NOMINAL IN, insertion_loss_in_decibels: 1.3, terminal_type_and_quantity: 4 CONNECTOR, COAXIAL, FEMALE. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 6625-01-384-4943, 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
MRO→ MRO_GENERAL→ 4321B-4
NSN: 6625-01-384-4943
FSC: 6625
CAGE: 99899 — NARDA HOLDINGS, INC. DBA NARDA-MITEQ DIV NARDA-MITEQ (USA)
SPECIFICATIONS
power_rating10.0 WATTS AVERAGE
overall_width2.380 INCHES NOMINAL IN
overall_height0.400 INCHES NOMINAL IN
overall_length2.970 INCHES NOMINAL IN
output_quantity1
insertion_loss_in_decibels1.3
terminal_type_and_quantity4 CONNECTOR, COAXIAL, FEMALE
voltage_standing_wave_ratio1.45 AND 1.30
mounting_facility_type_and_quantity2 UNTHREADED HOLE(S)
coaxial_connector_series_designationBNC
NSN6625-01-384-4943
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available 4321B-4 TITLE COMPONENT PN 4321B-4 MFR 4321B-4
KEY FEATURES
•
INSERTION LOSS IN DECIBELS: 1.3
•
OUTPUT QUANTITY: 1
•
VOLTAGE STANDING WAVE RATIO: 1.45 AND 1.30
•
POWER RATING: 10.0 WATTS AVERAGE
•
TERMINAL TYPE AND QUANTITY: 4 CONNECTOR, COAXIAL, FEMALE
TECHNICAL CHARACTERISTICS (FLIS)
INSERTION LOSS IN DECIBELS1.3
OUTPUT QUANTITY1
VOLTAGE STANDING WAVE RATIO1.45 AND 1.30
POWER RATING10.0 WATTS AVERAGE
OVERALL LENGTH2.970 INCHES NOMINAL IN
TERMINAL TYPE AND QUANTITY4 CONNECTOR, COAXIAL, FEMALE
OVERALL HEIGHT0.400 INCHES NOMINAL IN
OVERALL WIDTH2.380 INCHES NOMINAL IN
COAXIAL CONNECTOR SERIES DESIGNATIONBNC
MOUNTING FACILITY TYPE AND QUANTITY2 UNTHREADED HOLE(S)
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
954771Interchangeable
interchangeable cross-reference
interchangeable
43214Interchangeable
interchangeable cross-reference
interchangeable
214KGInterchangeable
interchangeable cross-reference
interchangeable
17604Interchangeable
interchangeable cross-reference
interchangeable
PT1984Interchangeable
interchangeable cross-reference
interchangeable
PEI 7273Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99ESD SensitiveNot HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 4321B-4?
4321B-4 is a 4321B-4. It is classified as a MRO (MRO_GENERAL).
What parts can replace 4321B-4?
There are 15 known substitutes for 4321B-4: 954771, 43214, 214KG and 12 more. Substitute compatibility should be verified for your specific system.
Is 4321B-4 still available?
4321B-4 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