PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

GM-573-55Coupler,directional

Microwave Devices Inc · NSN 5985-00-581-9665 · FSC 5985 · No Item Name Available
Verified by PartsTable
NSN 5985-00-581-9665 — this item is cataloged by the U.S. Government under National Stock Number 5985-00-581-9665. Primary manufacturer part number: GM-573-55.
Features
  • Coupler,directional — FSC 5985
  • Identifying Number: TERMINAL FITTING TYPE C,NO. 1-389-1
  • Power Loss in Decibels: 0.5
  • Unit Type: TRANSMISSION LINE
  • Design Type: UNIDIRECTIONAL
  • Terminal Fitting Controlling Agency: DADE ELECTRIC CO
  • Radio Frequency Rating: 220.0 MEGAHERTZ NOMINAL
  • Usage Design: MAIN LINE TERMINAL FITTING
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Coupler,directional, cataloged under National Stock Number 5985-00-581-9665, 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 Microwave Devices Inc. Government technical data includes 7 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5985-00-581-9665
Primary Part NumberGM-573-55
Item NameCoupler,directional
FSC / FSG5985 / 59 — No Item Name Available
ManufacturerMicrowave Devices Inc
StatusACTIVE
Identifying NumberTERMINAL FITTING TYPE C,NO. 1-389-1
Power Loss in Decibels0.5
Unit TypeTRANSMISSION LINE
Design TypeUNIDIRECTIONAL
Terminal Fitting Controlling AgencyDADE ELECTRIC CO
Radio Frequency Rating220.0 MEGAHERTZ NOMINAL
Usage DesignMAIN LINE TERMINAL FITTING
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
5365-00-064-53325735-5 INTERCHANGEABLE
Spacer,sleeve
Goodrich Aerospace Canada Ltd
5305-01-129-143957355 INTERCHANGEABLE
Screw,cap,hexagon Head
Sabre Engines Ltd
7510-01-567-43325413 1/4 IN. INTERCHANGEABLE
Tape,pressure Sensitive Adhesive
3m Company
Cross-Reference Index
Part NumberManufacturer
GM-573-55 Amphenol Corp Div Amphenol Aerospace Operations (USA)
GM-573-55 PRIMARY Microwave Devices Inc (USA)
573-55 Microwave Devices Inc (USA)
Related Parts
5365-00-064-5332INTERCHANGEABLE
SPACER,SLEEVE
5735-5
5305-01-129-1439INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
57355
7510-01-567-4332INTERCHANGEABLE
TAPE,PRESSURE SENSITIVE ADHESIVE
5413 1/4 IN.

Frequently Asked Questions

What is NSN 5985-00-581-9665?

NSN 5985-00-581-9665 is a Coupler,directional, manufactured by Microwave Devices Inc, classified under FSC 5985 (No Item Name Available). Status: active.

What are the part numbers for NSN 5985-00-581-9665?

NSN 5985-00-581-9665 has 3 cross-referenced part numbers: GM-573-55 (Amphenol Corp Div Amphenol Aerospace Operations), GM-573-55 (Microwave Devices Inc), 573-55 (Microwave Devices Inc).

What NSN replaces 5985-00-581-9665?

There are 3 known substitutes for 5985-00-581-9665: 5365-00-064-5332, 5305-01-129-1439, 7510-01-567-4332. Verify interchangeability with system specifications before substitution.

What are the specifications of GM-573-55?

Key specifications for GM-573-55: Identifying Number: TERMINAL FITTING TYPE C,NO. 1-389-1; Power Loss in Decibels: 0.5; Unit Type: TRANSMISSION LINE; Design Type: UNIDIRECTIONAL. 10 total characteristics are documented in the Federal Logistics Information System.

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