NSN 5985-00-978-4255 · NIIN 009784255 · Part number 9975889-2
Us Army Aviation and Missile Command · FSC 5985 — Antennas, Waveguides, and Related Equipment · FSG 59 — Electrical and Electronic Equipment Components · CAGE 18876
Government record, cited
NSN 5985-00-978-4255 — this item is cataloged by the U.S. Government under National Stock Number 5985-00-978-4255. Manufacturer of record part number: 9975889-2.
Also searched as5985-00-978-4255 ·
5985009784255 ·
NIIN 009784255 ·
00-978-4255 ·
FSC 5985 Antennas, Waveguides, and Related Equipment · CAGE 18876 · 9975889-2 · HWA31
Nearby stock numbers← 5985-00-978-3127
·
5985-00-978-4266 Line, Radio Frequency Transmission →
Features
Coupler,directional — FSC 5985
Usage Design: MAIN LINE AND SECONDARY LINE TERMINAL FITTING
Power Loss in Decibels: 0.2
Design Type: UNIDIRECTIONAL
Radio Frequency Rating: 900.0 MEGAHERTZ MINIMUM AND 2.0 GIGAHERTZ MAXIMUM
Unit Type: COAXIAL LINE
2 manufacturer part numbers on file
Manufacturer of record: Us Army Aviation and Missile Command
Identification
NSN: 5985-00-978-4255
NIIN: 009784255
FSC: 5985 — Antennas, Waveguides, and Related Equipment
FSG: 59 — Electrical and Electronic Equipment Components
Primary part number: 9975889-2
Manufacturer: Us Army Aviation and Missile Command
General Description
The Coupler,directional, cataloged under National Stock Number 5985-00-978-4255, 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 Us Army Aviation and Missile Command. Government technical data includes 5 specifications, cited from the U.S. Government catalog. The record lists 2 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
5985-00-978-4255
Primary Part Number
9975889-2
Item Name
Coupler,directional
FSC / FSG
5985 / 59 — Antennas, Waveguides, and Related Equipment
Manufacturer
Us Army Aviation and Missile Command
Status
ACTIVE
Usage Design
MAIN LINE AND SECONDARY LINE TERMINAL FITTING
Power Loss in Decibels
0.2
Design Type
UNIDIRECTIONAL
Radio Frequency Rating
900.0 MEGAHERTZ MINIMUM AND 2.0 GIGAHERTZ MAXIMUM
Unit Type
COAXIAL LINE
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
Possible hazard — SDS may be required (DLA HMIC P)
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 5985-00-978-4255?
NSN 5985-00-978-4255 is a Coupler,directional, manufactured by Us Army Aviation and Missile Command, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
What part numbers are listed for NSN 5985-00-978-4255?
NSN 5985-00-978-4255 has 2 manufacturer part numbers on file: 9975889-2 (Us Army Aviation and Missile Command), HWA31 (Microlab/fxr Llc).
What are the specifications of 9975889-2?
Key specifications for 9975889-2: Overall Height: 0.838 INCHES NOMINAL IN; Usage Design: MAIN LINE AND SECONDARY LINE TERMINAL FITTING; Power Loss in Decibels: 0.2; Design Type: UNIDIRECTIONAL. 5 specifications are documented in the U.S. Government catalog.
Is NSN 5985-00-978-4255 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.