The Adapter,waveguide, cataloged under National Stock Number 5985-01-166-7178, 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 26 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. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-01-166-7178 |
| Primary Part Number | 5262589 |
| Item Name | Adapter,waveguide |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| FSC Application Data | ANTENNAS,WAVEGUIDES,AND RELATED EQUIPMENT |
| Flange Inside Height | 0.309 INCHES MINIMUM AND 0.313 INCHES MAXIMUM FIRST FLANGE IN |
| Flange Inside Height | 0.372 INCHES MINIMUM AND 0.378 INCHES MAXIMUM SECOND FLANGE IN |
| Flange Quantity | 2 |
| Precious Material | SILVER |
| Voltage Standing Wave Ratio | 1.07 |
| Style Designator | WAVEGUIDE TO WAVEGUIDE |
| Cross-Sectional Shape Style | INTERNAL, RECTANGULAR EXTERNAL, RECTANGULAR |
| Flange Outside Height | 1.298 INCHES MINIMUM AND 1.328 INCHES MAXIMUM FIRST FLANGE IN |
| Flange Outside Height | 1.485 INCHES MINIMUM AND 1.515 INCHES MAXIMUM SECOND FLANGE IN |
| Adapter Length | 2.000 INCHES NOMINAL IN |
| Flange Connecting Hole Diameter | 0.144 INCHES NOMINAL FIRST FLANGE ALL CONNECTION FACILITIES IN |
| Flange Connecting Hole Diameter | 0.144 INCHES NOMINAL SECOND FLANGE ALL CONNECTION FACILITIES IN |
| Flange Inside Width | 0.620 INCHES MINIMUM AND 0.624 INCHES MAXIMUM FIRST FLANGE IN |
| Flange Inside Width | 0.747 INCHES MINIMUM AND 0.753 INCHES MAXIMUM SECOND FLANGE IN |
| Flange Depth | 0.160 INCHES MINIMUM AND 0.200 INCHES MAXIMUM FIRST FLANGE IN |
| Flange Depth | 0.180 INCHES MINIMUM AND 0.220 INCHES MAXIMUM SECOND FLANGE IN |
| Flange Outside Width | 1.298 INCHES MINIMUM AND 1.328 INCHES MAXIMUM FIRST FLANGE IN |
| Flange Outside Width | 1.485 INCHES MINIMUM AND 1.515 INCHES MAXIMUM SECOND FLANGE IN |
| Surface Treatment | SILVER ALL TUBING SEGMENT AND FLANGE INSIDE SURFACES |
| Surface Treatment | PAINT ALL TUBING SEGMENT AND FLANGE OUTSIDE SURFACES |
| Precious Material and Location | INTERNAL SURFACES SILVER |
| Material | COPPER ALLOY ALL TUBING SEGMENT AND FLANGE |
| Flange Connecting Facility and Quantity | 4 UNTHREADED HOLE(S) FIRST FLANGE ALL CONNECTION FACILITIES |
| Flange Connecting Facility and Quantity | 4 UNTHREADED HOLE(S) SECOND FLANGE ALL CONNECTION FACILITIES |
| Flange Style | COVER TYPE ALL FLANGES |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
NSN 5985-01-166-7178 is a Adapter,waveguide, manufactured by Naval Sea Systems Command, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-01-166-7178 has 3 manufacturer part numbers on file: 225292 (Microtech Inc Dba Microtech Inc), 62EU69-1F (Microwave Development Laboratories, Inc. Dba Microwave Development Laboratories Inc), 5262589 (Naval Sea Systems Command).
1 possible match (shared part number, not a government interchangeability claim): 5325-01-632-1663. Verify interchangeability with system specifications before substitution.
Key specifications for 5262589: FSC Application Data: ANTENNAS,WAVEGUIDES,AND RELATED EQUIPMENT; Flange Inside Height: 0.309 INCHES MINIMUM AND 0.313 INCHES MAXIMUM FIRST FLANGE IN; Flange Inside Height: 0.372 INCHES MINIMUM AND 0.378 INCHES MAXIMUM SECOND FLANGE IN; Flange Quantity: 2. 26 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
NSN 5985-01-166-7178 has DEMIL Code D. Demilitarization may be required before disposal or transfer to non-military entities.
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.