PartsTable
Technical Data Sheet

FCW-1904/40781 — CIRCULATOR,RADIO FREQUENCY

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

FCW-1904/40781: CIRCULATOR,RADIO FREQUENCY.

The CIRCULATOR,RADIO FREQUENCY is a the manufacturer industrial component. Key specifications include width: 1.507 INCHES NOMINAL IN, length: 3.007 INCHES NOMINAL IN, flange_type: COVER, document_type: MILITARY SPECIFICATION, overall_length: 29.750 INCHES NOMINAL IN, connection_method: WAVEGUIDE FLANGE. This part is cataloged in the U.S.

Government catalog under NSN 5985-01-101-6288, 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
FCW-1904/40781
NSN: 5985-01-101-6288
FSC: 5985 — Antennas, Waveguides, and Related Equipment
CAGE: 12457 — MERRIMAC INDUSTRIES, INC (USA)
SPECIFICATIONS
width1.507 INCHES NOMINAL IN
length3.007 INCHES NOMINAL IN
flange_typeCOVER
document_typeMILITARY SPECIFICATION
overall_length29.750 INCHES NOMINAL IN
connection_methodWAVEGUIDE FLANGE
frequency_range_rating+2.7 TO 2.9 GIGAHERTZ
document_identificationMIL-F-3922/56
identification_designatorTYPE UG-584/U
insertion_loss_in_decibels0.5
flange_connecting_hole_diameter0.257 INCHES NOMINAL IN
flange_connection_facility_quantity8
NSN5985-01-101-6288
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available CIRCULATOR,RADIO FREQUENCY TITLE COMPONENT PN FCW-1904/40781 MFR CIRCULATOR,RADIO FREQU
KEY FEATURES
•
DOCUMENT TYPE: MILITARY SPECIFICATION
•
LENGTH: 3.007 INCHES NOMINAL IN
•
CONNECTION METHOD: WAVEGUIDE FLANGE
•
FLANGE TYPE: COVER
•
FLANGE CONNECTING HOLE DIAMETER: 0.257 INCHES NOMINAL IN
•
IDENTIFICATION DESIGNATOR: TYPE UG-584/U
•
FREQUENCY RANGE RATING: +2.7 TO 2.9 GIGAHERTZ
TECHNICAL CHARACTERISTICS
DOCUMENT TYPEMILITARY SPECIFICATION
LENGTH3.007 INCHES NOMINAL IN
CONNECTION METHODWAVEGUIDE FLANGE
FLANGE TYPECOVER
OVERALL LENGTH29.750 INCHES NOMINAL IN
FLANGE CONNECTING HOLE DIAMETER0.257 INCHES NOMINAL IN
IDENTIFICATION DESIGNATORTYPE UG-584/U
FREQUENCY RANGE RATING+2.7 TO 2.9 GIGAHERTZ
DOCUMENT IDENTIFICATIONMIL-F-3922/56
INSERTION LOSS IN DECIBELS0.5
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)Demilitarization required — mutilation + specific procedure
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FREQUENTLY ASKED QUESTIONS
What is FCW-1904/40781?
FCW-1904/40781 is a CIRCULATOR,RADIO FREQUENCY.
What is the NSN for FCW-1904/40781?
FCW-1904/40781 is cataloged in the U.S. Government catalog under NSN 5985-01-101-6288. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.