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4251818 — COUPLER,DIRECTIONAL

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

4251818: COUPLER,DIRECTIONAL.

The COUPLER,DIRECTIONAL is a the manufacturer industrial component. Key specifications include unit_type: TRANSMISSION LINE, design_type: UNIDIRECTIONAL, usage_design: MAIN LINE TERMINAL FITTING, overall_depth: 2.020 INCHES NOMINAL IN, overall_height: 2.330 INCHES NOMINAL IN, overall_length: 2.480 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5985-00-357-6086, 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
4251818
NSN: 5985-00-357-6086
FSC: 5985 — Antennas, Waveguides, and Related Equipment
CAGE: 65180 — UNISYS CORP SYSTEMS DEVELOPMENT (USA)
SPECIFICATIONS
unit_typeTRANSMISSION LINE
design_typeUNIDIRECTIONAL
usage_designMAIN LINE TERMINAL FITTING
overall_depth2.020 INCHES NOMINAL IN
overall_height2.330 INCHES NOMINAL IN
overall_length2.480 INCHES NOMINAL IN
identifying_numberTERMINAL FITTING PART NO. 10688240; PART NO. 10236924-2
fsc_application_dataANTENNAS,WAVEGUIDES,AND RELATD EQUIPMENT
power_loss_in_decibels0.5
terminal_fitting_controlling_agencyU.S. ARMY
NSN5985-00-357-6086
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available COUPLER,DIRECTIONAL TITLE COMPONENT PN 4251818 MFR COUPLER,DIRECTIONAL
KEY FEATURES
•
FSC APPLICATION DATA: ANTENNAS,WAVEGUIDES,AND RELATD EQUIPMENT
•
TERMINAL FITTING CONTROLLING AGENCY: U.S. ARMY
•
USAGE DESIGN: MAIN LINE TERMINAL FITTING
•
POWER LOSS IN DECIBELS: 0.5
•
IDENTIFYING NUMBER: TERMINAL FITTING PART NO. 10688240; PART NO. 10236924-2
•
DESIGN TYPE: UNIDIRECTIONAL
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT2.330 INCHES NOMINAL IN
FSC APPLICATION DATAANTENNAS,WAVEGUIDES,AND RELATD EQUIPMENT
TERMINAL FITTING CONTROLLING AGENCYU.S. ARMY
USAGE DESIGNMAIN LINE TERMINAL FITTING
POWER LOSS IN DECIBELS0.5
IDENTIFYING NUMBERTERMINAL FITTING PART NO. 10688240; PART NO. 10236924-2
DESIGN TYPEUNIDIRECTIONAL
OVERALL LENGTH2.480 INCHES NOMINAL IN
UNIT TYPETRANSMISSION LINE
OVERALL DEPTH2.020 INCHES NOMINAL IN
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 1
5985003576086Reference document
Same NSN cross-reference
Reference document — Informative reference only
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 4251818?
4251818 is a COUPLER,DIRECTIONAL.
What parts can replace 4251818?
There is 1 known substitute for 4251818: 5985003576086. Substitute compatibility should be verified for your specific system.
What is the NSN for 4251818?
4251818 is cataloged in the U.S. Government catalog under NSN 5985-00-357-6086. 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.