The Adapter,waveguide, cataloged under National Stock Number 5985-00-615-9766, 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 Lockheed Martin Corporation Div Rms - Mitchel Field. Government technical data includes 24 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-00-615-9766 |
| Primary Part Number | 5665681 |
| Item Name | Adapter,waveguide |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Lockheed Martin Corporation Div Rms - Mitchel Field |
| Status | ACTIVE |
| Tubing Wall Construction Style | SEAMLESS SINGLE TUBING SEGMENT |
| Flange Inside Height | 1.000 INCHES NOMINAL SINGLE FLANGE IN |
| Flange Quantity | 1 |
| Voltage Standing Wave Ratio | 1.25 |
| Adapter Diameter | 3.250 INCHES NOMINAL IN |
| Style Designator | WAVEGUIDE TO COAXIAL |
| Waveguide Inside Width | 1.872 INCHES NOMINAL IN |
| Connector End Design | FEMALE |
| Cross-Sectional Shape Style | INTERNAL, RECTANGULAR EXTERNAL, RECTANGULAR |
| Adapter Overall Height | 3.625 INCHES NOMINAL IN |
| Adapter Length | 2.000 INCHES NOMINAL IN |
| Flange Connecting Hole Diameter | 0.219 INCHES MINIMUM AND 0.222 INCHES MAXIMUM SINGLE FLANGE ALL CONNECTION FACILITIES IN |
| Flange Inside Width | 2.000 INCHES NOMINAL SINGLE FLANGE IN |
| Waveguide Outside Height | 1.000 INCHES NOMINAL IN |
| Waveguide Outside Width | 2.000 INCHES NOMINAL IN |
| Flange Depth | 0.375 INCHES NOMINAL SINGLE FLANGE IN |
| Surface Treatment | PAINT SINGLE FLANGE ALL SURFACES |
| Waveguide Inside Height | 0.872 INCHES NOMINAL IN |
| Material | ALUMINUM SINGLE TUBING SEGMENT |
| Material | ALUMINUM SINGLE FLANGE |
| Flange Connecting Facility and Quantity | 8 UNTHREADED HOLE(S) SINGLE FLANGE ALL CONNECTION FACILITIES |
| Flange Outside Diameter | 3.250 INCHES NOMINAL SINGLE FLANGE IN |
| Flange Style | COVER TYPE SINGLE FLANGE |
| Coaxial Connector Series Designation | N |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 5665681 PRIMARY | Lockheed Martin Corporation Div Rms - Mitchel Field (USA) |
| Reference | Meaning |
|---|---|
| 5665681 | 5/2 Secondary reference U.S. Government activity |
| R5665681REVG | 5/9 Secondary reference Lockheed Martin Corporation Div Rms - Mitchel Field |
NSN 5985-00-615-9766 is a Adapter,waveguide, manufactured by Lockheed Martin Corporation Div Rms - Mitchel Field, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-00-615-9766 has 1 manufacturer part number on file: 5665681 (Lockheed Martin Corporation Div Rms - Mitchel Field).
Key specifications for 5665681: Tubing Wall Construction Style: SEAMLESS SINGLE TUBING SEGMENT; Flange Inside Height: 1.000 INCHES NOMINAL SINGLE FLANGE IN; Flange Quantity: 1; Voltage Standing Wave Ratio: 1.25. 24 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.
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.