PartsTable TECHNICAL DATA SHEET

NSN 5985-01-666-5566Government record, cited

Adapter, Waveguide5985-01-666-5566

NSN 5985-01-666-5566 · NIIN 016665566

FSC 5985 — Antennas, Waveguides, and Related Equipment · FSG 59 — Electrical and Electronic Equipment Components

Government record, cited

Also searched as 5985-01-666-5566 · 5985016665566 · NIIN 016665566 · 01-666-5566 · FSC 5985 Antennas, Waveguides, and Related Equipment · 90/112-6-6-6 · MC920002

Nearby stock numbers ← 5985-01-666-5552 Coupler, Directional · 5985-01-666-5569 Cover, Waveguide Flange →

Features

Adapter,waveguide — FSC 5985

Identification

NSN: 5985-01-666-5566
NIIN: 016665566
FSC: 5985 — Antennas, Waveguides, and Related Equipment
FSG: 59 — Electrical and Electronic Equipment Components

General Description

The Adapter,waveguide, cataloged under National Stock Number 5985-01-666-5566, is classified within Federal Supply Class 5985 (Antennas, Waveguides, and Related Equipment) of the Electrical and Electronic Equipment Components group. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.

Catalog Facts

Item Name	Adapter,waveguide
FSC / FSG	5985 — Antennas, Waveguides, and Related Equipment (FSG 59)

Technical Specifications

Parameter	Value
NSN	5985-01-666-5566
Item Name	Adapter,waveguide
FSC / FSG	5985 / 59 — Antennas, Waveguides, and Related Equipment
Status	ACTIVE

Lifecycle & Compliance

Acquisition Status	ACTIVE
DEMIL Code	DEMIL Q — CCL Item — Commerce Control List
Hazard	Possible hazard — SDS may be required (DLA HMIC P)
Criticality Code	X

⇄ Related Items 4

Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.

5985-01-666-5569 POSSIBLE MATCH

COVER,WAVEGUIDE FLANGE

Possible match (shared part number)

5985-01-666-5575 POSSIBLE MATCH

COVER,WAVEGUIDE FLANGE

Possible match (shared part number)

5985-01-666-5579 POSSIBLE MATCH

WAVEGUIDE ASSEMBLY

Possible match (shared part number)

4820-01-667-1456559T-1M-28 POSSIBLE MATCH

VALVE,SAFETY RELIEF

Possible match (shared part number)Circor Aerospace, Inc. Dba Circor Aerospace Inc

Cross-Reference Index

No manufacturer part numbers on file in the U.S. Government catalog.

Reference documents

Reference	Meaning
90/112-6-6-6	3/9 Design control — primary reference Advanced Technical Materials, Inc. Dba a T M
MC920002	5/9 Secondary reference U.S. Government activity

Related Parts

5985-01-666-5569POSSIBLE MATCH

COVER,WAVEGUIDE FLANGE

5985-01-666-5575POSSIBLE MATCH

COVER,WAVEGUIDE FLANGE

5985-01-666-5579POSSIBLE MATCH

WAVEGUIDE ASSEMBLY

4820-01-667-1456POSSIBLE MATCH

VALVE,SAFETY RELIEF

559T-1M-28

Frequently Asked Questions

What is NSN 5985-01-666-5566?

NSN 5985-01-666-5566 is a Adapter,waveguide, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.

What NSN replaces 5985-01-666-5566?

4 possible matches (shared part number, not a government interchangeability claim): 5985-01-666-5569, 5985-01-666-5575, 5985-01-666-5579. Verify interchangeability with system specifications before substitution.

Is NSN 5985-01-666-5566 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.

What is the DEMIL code for NSN 5985-01-666-5566?

NSN 5985-01-666-5566 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.

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.

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