PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

FX78-50SCoupler,transmission Line

Rfs Technologies, Inc. · NSN 5985-00-823-9930 · FSC 5985 · No Item Name Available
Verified by PartsTable
NSN 5985-00-823-9930 — this item is cataloged by the U.S. Government under National Stock Number 5985-00-823-9930. Primary manufacturer part number: FX78-50S.
Features
  • Coupler,transmission Line — FSC 5985
  • Unit Type: COAXIAL LINE
  • Input Impedance Rating in Ohms: 50.0
  • Overall Diameter: 0.875 INCHES NOMINAL IN
  • Output Impedance Rating in Ohms: 50.0
  • Mounting Configuration: TERMINAL MTD
  • 4 verified cross-references
  • Primary manufacturer: Rfs Technologies, Inc.
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Coupler,transmission Line, cataloged under National Stock Number 5985-00-823-9930, is classified within Federal Supply Class 5985 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is Rfs Technologies, Inc.. Government technical data includes 5 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5985-00-823-9930
Primary Part NumberFX78-50S
Item NameCoupler,transmission Line
FSC / FSG5985 / 59 — No Item Name Available
ManufacturerRfs Technologies, Inc.
StatusCANCELLED
Unit TypeCOAXIAL LINE
Input Impedance Rating in Ohms50.0
Overall Diameter0.875 INCHES NOMINAL IN
Output Impedance Rating in Ohms50.0
Mounting ConfigurationTERMINAL MTD
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 3
2920-00-064-69431949429 INTERCHANGEABLE
Drive,engine,electrical Starter
Delco Remy America Inc
2920-00-997-8681 INTERCHANGEABLE
Drive,engine,electrical Starter
5330-01-073-0022SSCY14644-405 INTERCHANGEABLE
Seal,plain Encased
Stein Seal Company
Cross-Reference Index
Part NumberManufacturer
FX78-50S Rfs Technologies, Inc. (USA)
734027 Rfs Technologies, Inc. (USA)
734027 M/a-Com Omni Spectra Inc Cablewave Miniature Products (USA)
79-880 Cpi Satcom & Antenna Technologies Inc. (USA)
Related Parts
2920-00-064-6943INTERCHANGEABLE
DRIVE,ENGINE,ELECTRICAL STARTER
1949429
2920-00-997-8681INTERCHANGEABLE
DRIVE,ENGINE,ELECTRICAL STARTER
5330-01-073-0022INTERCHANGEABLE
SEAL,PLAIN ENCASED
SSCY14644-405

Frequently Asked Questions

What is NSN 5985-00-823-9930?

NSN 5985-00-823-9930 is a Coupler,transmission Line, manufactured by Rfs Technologies, Inc., classified under FSC 5985 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5985-00-823-9930?

NSN 5985-00-823-9930 has 4 cross-referenced part numbers: FX78-50S (Rfs Technologies, Inc.), 734027 (Rfs Technologies, Inc.), 734027 (M/a-Com Omni Spectra Inc Cablewave Miniature Products), 79-880 (Cpi Satcom & Antenna Technologies Inc.).

What NSN replaces 5985-00-823-9930?

There are 3 known substitutes for 5985-00-823-9930: 2920-00-064-6943, 2920-00-997-8681, 5330-01-073-0022. Verify interchangeability with system specifications before substitution.

What are the specifications of FX78-50S?

Key specifications for FX78-50S: Overall Length: 2.938 INCHES NOMINAL IN; Unit Type: COAXIAL LINE; Input Impedance Rating in Ohms: 50.0; Overall Diameter: 0.875 INCHES NOMINAL IN. 6 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5985-00-823-9930 still in active supply?

NSN 5985-00-823-9930 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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