PartsTable
Technical Data Sheet

TO-D4-20V/B — COUPLER,DIRECTIONAL

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

TO-D4-20V/B: COUPLER,DIRECTIONAL.

The COUPLER,DIRECTIONAL is a the manufacturer industrial component. Key specifications include unit_type: TRANSMISSION LINE, design_type: BIDIRECTIONAL, usage_design: MAIN LINE AND SECONDARY LINE TERMINAL FITTING, overall_length: 0.890 INCHES NOMINAL IN, overall_diameter: 0.363 INCHES NOMINAL IN, precious_material: GOLD. This part is cataloged in the U.S.

Government catalog under NSN 5985-01-183-6592, 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
TO-D4-20V/B
NSN: 5985-01-183-6592
FSC: 5985 — Antennas, Waveguides, and Related Equipment
CAGE: 32252 — SIGNAL TECHNOLOGY CORPORATION DIV SYSTEMS OPERATION (USA)
SPECIFICATIONS
unit_typeTRANSMISSION LINE
design_typeBIDIRECTIONAL
usage_designMAIN LINE AND SECONDARY LINE TERMINAL FITTING
overall_length0.890 INCHES NOMINAL IN
overall_diameter0.363 INCHES NOMINAL IN
precious_materialGOLD
power_loss_in_decibels20.0
radio_frequency_rating2.0 MEGAHERTZ MINIMUM AND 250.0 MEGAHERTZ MAXIMUM
end_item_identificationAN/ALQ-158(V)
precious_material_and_locationEXTERNAL SURFACES GOLD
NSN5985-01-183-6592
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available COUPLER,DIRECTIONAL TITLE COMPONENT PN TO-D4-20V/B MFR COUPLER,DIRECTIONAL
KEY FEATURES
•
USAGE DESIGN: MAIN LINE AND SECONDARY LINE TERMINAL FITTING
•
POWER LOSS IN DECIBELS: 20.0
•
DESIGN TYPE: BIDIRECTIONAL
•
OVERALL DIAMETER: 0.363 INCHES NOMINAL IN
•
PRECIOUS MATERIAL: GOLD
•
RADIO FREQUENCY RATING: 2.0 MEGAHERTZ MINIMUM AND 250.0 MEGAHERTZ MAXIMUM
•
UNIT TYPE: TRANSMISSION LINE
TECHNICAL CHARACTERISTICS
USAGE DESIGNMAIN LINE AND SECONDARY LINE TERMINAL FITTING
POWER LOSS IN DECIBELS20.0
DESIGN TYPEBIDIRECTIONAL
OVERALL DIAMETER0.363 INCHES NOMINAL IN
PRECIOUS MATERIALGOLD
RADIO FREQUENCY RATING2.0 MEGAHERTZ MINIMUM AND 250.0 MEGAHERTZ MAXIMUM
OVERALL LENGTH0.890 INCHES NOMINAL IN
UNIT TYPETRANSMISSION LINE
PRECIOUS MATERIAL AND LOCATIONEXTERNAL SURFACES GOLD
END ITEM IDENTIFICATIONAN/ALQ-158(V)
OTHER ITEMS IN FSC 5985 — Antennas, Waveguides, and Related Equipment
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5985-00-001-1854 5985-00-001-1862 5985-00-001-1869 5985-00-001-1870 5985-00-001-1871 5985-00-001-1874 5985-00-001-1875 5985-00-001-1876
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — stock exhausted; no further procurementNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is TO-D4-20V/B?
TO-D4-20V/B is a COUPLER,DIRECTIONAL.
What is the NSN for TO-D4-20V/B?
TO-D4-20V/B is cataloged in the U.S. Government catalog under NSN 5985-01-183-6592. 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.