The Switch,waveguide, cataloged under National Stock Number 5985-00-476-4489, 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 Caes Mission Systems Llc. Government technical data includes 27 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-00-476-4489 |
| Primary Part Number | MD20K5 |
| Item Name | Switch,waveguide |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Caes Mission Systems Llc |
| Status | ACTIVE |
| Waveguide Flange Type | CHOKE AND COVER |
| Mounting Facility Type and Quantity | 4 UNTHREADED HOLE(S) |
| Body Style | RECTANGULAR |
| Mounting Facility Pattern | FOUR POSITION RECTANGULAR SINGLE MOUNTING FACILITY PATTERN |
| Voltage Standing Wave Ratio | 1.30 SINGLE |
| Unthreaded Mounting Hole Diameter | 0.144 INCHES MINIMUM AND 0.147 INCHES MAXIMUM IN |
| Pole Quantity | 1 |
| Longest Vertical Distance Between Mounting Centers | 0.956 INCHES NOMINAL SINGLE MOUNTING FACILITY PATTERN IN |
| Coupling Position Quantity | 2 |
| Nominal Thread Size | 0.138 INCHES FLANGE CONNECTION FACILITY HOLE IN |
| Minimum Crosstalk Rating in Decibels | 60.0 SINGLE |
| Switch Type | NONTRANSFER |
| Insertion Loss in Decibels | 1.60 SINGLE |
| Actuator Operating Method | RELAY |
| Surface Treatment | PAINT BODY OUTSIDE SURFACES |
| Operating Temp Range | -55.0 TO 85.0 CELSIUS DEGC |
| Frequency Rating | 13.275 GIGAHERTZ MINIMUM AND 13.375 GIGAHERTZ MAXIMUM SINGLE FREQUENCY CROSSTALK REFERENCE |
| Frequency Rating | 13.275 GIGAHERTZ MINIMUM AND 13.375 GIGAHERTZ MAXIMUM SINGLE FREQUENCY INSERTION LOSS REFERENCE |
| Frequency Rating | 13.275 GIGAHERTZ MINIMUM AND 13.375 GIGAHERTZ MAXIMUM SINGLE FREQUENCY OPERATING |
| Frequency Rating | 13.275 GIGAHERTZ MINIMUM AND 13.375 GIGAHERTZ MAXIMUM SINGLE FREQUENCY RF POWER HANDLING |
| Frequency Rating | 13.275 GIGAHERTZ MINIMUM AND 13.375 GIGAHERTZ MAXIMUM SINGLE FREQUENCY VOLTAGE STANDING WAVE RATIO |
| Rf Power Handling Capability | 40.0 WATTS PEAK SINGLE |
| Material | ALUMINUM ALLOY BODY |
| Flange Connecting Facility and Quantity | 4 THREADED HOLE(S) AND 4 UNTHREADED HOLE(S) |
| Terminal Type and Quantity | 1 RECEPTACLE, COAXIAL AND 2 RECTANGULAR FLANGE |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) FLANGE CONNECTION FACILITY HOLE |
| Longest Horizontal Distance Between Mounting Centers | 0.956 INCHES NOMINAL SINGLE MOUNTING FACILITY PATTERN IN |
| 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 |
|---|---|
| MD20K5 | Caes Mission Systems Llc (USA) |
| G128-218-002 | Bae Systems Information and Electronic Systems Integration Inc. (USA) |
| Reference | Meaning |
|---|---|
| G128-218-002 | 5/9 Secondary reference U.S. Government activity |
| MA83201Z10 | 3/9 Design control — primary reference U.S. Government activity |
NSN 5985-00-476-4489 is a Switch,waveguide, manufactured by Caes Mission Systems Llc, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-00-476-4489 has 2 manufacturer part numbers on file: MD20K5 (Caes Mission Systems Llc), G128-218-002 (Bae Systems Information and Electronic Systems Integration Inc.).
Key specifications for MD20K5: Waveguide Flange Type: CHOKE AND COVER; Mounting Facility Type and Quantity: 4 UNTHREADED HOLE(S); Overall Height: 1.310 INCHES NOMINAL IN; Body Style: RECTANGULAR. 27 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 5985-00-476-4489 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.