The Adapter,waveguide, cataloged under National Stock Number 5985-01-406-2243, 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 Microwave Engineering Corporation. Government technical data includes 6 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-01-406-2243 |
| Primary Part Number | X240-541 |
| Item Name | Adapter,waveguide |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Microwave Engineering Corporation |
| Status | ACTIVE |
| Tubing Wall Construction Style | SEAMLESS SINGLE TUBING SEGMENT |
| Voltage Standing Wave Ratio | 1.30 |
| Style Designator | WAVEGUIDE TO COAXIAL |
| Cross-Sectional Shape Style | INTERNAL, RECTANGULAR EXTERNAL, RECTANGULAR |
| Adapter Length | 15.313 INCHES NOMINAL IN |
| Material | ALUMINUM ALLOY ALL TUBING SEGMENT AND FLANGE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| X240-541 PRIMARY | Microwave Engineering Corporation (USA) |
| MDL90PK889 PRIMARY | Microwave Development Laboratories, Inc. Dba Microwave Development Laboratories Inc (USA) |
| Reference | Meaning |
|---|---|
| 8655349 | 5/9 Secondary reference U.S. Government activity |
| 8655349 | 5/9 Secondary reference Microwave Products Group Inc |
| 8655349 | 7/2 Vendor item drawing reference U.S. Government activity |
NSN 5985-01-406-2243 is a Adapter,waveguide, manufactured by Microwave Engineering Corporation, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-01-406-2243 has 2 manufacturer part numbers on file: X240-541 (Microwave Engineering Corporation), MDL90PK889 (Microwave Development Laboratories, Inc. Dba Microwave Development Laboratories Inc).
Key specifications for X240-541: Tubing Wall Construction Style: SEAMLESS SINGLE TUBING SEGMENT; Voltage Standing Wave Ratio: 1.30; Style Designator: WAVEGUIDE TO COAXIAL; Cross-Sectional Shape Style: INTERNAL, RECTANGULAR EXTERNAL, RECTANGULAR. 6 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 5985-01-406-2243 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.