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Technical Data Sheet
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21337A — COUPLER,DIRECTIONAL

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

21337A: COUPLER,DIRECTIONAL.

The COUPLER,DIRECTIONAL is a the manufacturer industrial component. Key specifications include end_item_identification: AIRROUTE SURVEILLANCE RADAR 4 (ARSR4), part_name_assigned_by_controlling_agency: ROTARY RF COUPLER. This part is cataloged in the U.S.

Government catalog under NSN 5985-01-620-9758, 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
21337A
NSN: 5985-01-620-9758
FSC: 5985 — Antennas, Waveguides, and Related Equipment
CAGE: 66544 — FRONTGRADE TECHNOLOGIES INC. (USA)
SPECIFICATIONS
end_item_identificationAIRROUTE SURVEILLANCE RADAR 4 (ARSR4)
part_name_assigned_by_controlling_agencyROTARY RF COUPLER
NSN5985-01-620-9758
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available COUPLER,DIRECTIONAL TITLE COMPONENT PN 21337A MFR COUPLER,DIRECTIONAL
TECHNICAL CHARACTERISTICS
PART NAME ASSIGNED BY CONTROLLING AGENCYROTARY RF COUPLER
END ITEM IDENTIFICATIONAIRROUTE SURVEILLANCE RADAR 4 (ARSR4)
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
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 21337A?
21337A is a COUPLER,DIRECTIONAL.
What is the NSN for 21337A?
21337A is cataloged in the U.S. Government catalog under NSN 5985-01-620-9758. 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.