NSN 5985-01-188-8788 · NIIN 011888788 · Part number 5541977-1
Naval Sea Systems Command · FSC 5985 — Antennas, Waveguides, and Related Equipment · FSG 59 — Electrical and Electronic Equipment Components · CAGE 53711
Government record, cited
NSN 5985-01-188-8788 — this item is cataloged by the U.S. Government under National Stock Number 5985-01-188-8788. Manufacturer of record part number: 5541977-1.
Also searched as5985-01-188-8788 ·
5985011888788 ·
NIIN 011888788 ·
01-188-8788 ·
FSC 5985 Antennas, Waveguides, and Related Equipment · CAGE 53711 · 5541977-1 · TR785212 · 187XT279
Terminal Fitting Controlling Agency: DEPARTMENT OF DEFENSE
Usage Design: MAIN LINE AND SECONDARY LINE TERMINAL FITTING
Power Loss in Decibels: 30.0
Design Type: BIDIRECTIONAL
Radio Frequency Rating: 5.450 GIGAHERTZ MINIMUM AND 5.825 GIGAHERTZ MAXIMUM
Unit Type: COAXIAL LINE AND WAVEGUIDE
3 manufacturer part numbers on file
Identification
NSN: 5985-01-188-8788
NIIN: 011888788
FSC: 5985 — Antennas, Waveguides, and Related Equipment
FSG: 59 — Electrical and Electronic Equipment Components
Primary part number: 5541977-1
Manufacturer: Naval Sea Systems Command
General Description
The Coupler,directional, cataloged under National Stock Number 5985-01-188-8788, is classified within Federal Supply Class 5985 (Antennas, Waveguides, and Related Equipment) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 6 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
5985-01-188-8788
Primary Part Number
5541977-1
Item Name
Coupler,directional
FSC / FSG
5985 / 59 — Antennas, Waveguides, and Related Equipment
Manufacturer
Naval Sea Systems Command
Status
ACTIVE
Terminal Fitting Controlling Agency
DEPARTMENT OF DEFENSE
Usage Design
MAIN LINE AND SECONDARY LINE TERMINAL FITTING
Power Loss in Decibels
30.0
Design Type
BIDIRECTIONAL
Radio Frequency Rating
5.450 GIGAHERTZ MINIMUM AND 5.825 GIGAHERTZ MAXIMUM
Unit Type
COAXIAL LINE AND WAVEGUIDE
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
Possible hazard — SDS may be required (DLA HMIC P)
Microwave Development Laboratories, Inc. Dba Microwave Development Laboratories Inc (USA)
No interchangeability data on file.
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
ANTENNA
5985-00-001-1862
WAVEGUIDE ASSEMBLY
5985-00-001-1869
WAVEGUIDE ASSEMBLY
5985-00-001-1870
WAVEGUIDE ASSEMBLY
5985-00-001-1871
WAVEGUIDE ASSEMBLY
5985-00-001-1874
WAVEGUIDE ASSEMBLY
5985-00-001-1875
ADAPTER,WAVEGUIDE
5985-00-001-1876
WAVEGUIDE ASSEMBLY
Frequently Asked Questions
What is NSN 5985-01-188-8788?
NSN 5985-01-188-8788 is a Coupler,directional, manufactured by Naval Sea Systems Command, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
What part numbers are listed for NSN 5985-01-188-8788?
NSN 5985-01-188-8788 has 3 manufacturer part numbers on file: TR785212 (Microwave Engineering Corporation), 5541977-1 (Naval Sea Systems Command), 187XT279 (Microwave Development Laboratories, Inc. Dba Microwave Development Laboratories Inc).
What are the specifications of 5541977-1?
Key specifications for 5541977-1: Terminal Fitting Controlling Agency: DEPARTMENT OF DEFENSE; Usage Design: MAIN LINE AND SECONDARY LINE TERMINAL FITTING; Power Loss in Decibels: 30.0; Design Type: BIDIRECTIONAL. 6 specifications are documented in the U.S. Government catalog.
Is NSN 5985-01-188-8788 hazardous material?
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.