The Attenuator,variable, cataloged under National Stock Number 5985-01-023-2669, 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 18 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5985-01-023-2669 |
| Primary Part Number | MD-40K2D |
| Item Name | Attenuator,variable |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Caes Mission Systems Llc |
| Status | ACTIVE |
| Impedance Rating in Ohms | 90.0 INPUT-OUTPUT |
| Mounting Facility Type and Quantity | 4 UNTHREADED HOLE(S) |
| Frequency Range | 16.300 GIGAHERTZ MINIMUM AND 17.300 GIGAHERTZ MAXIMUM |
| Body Style | COAXIAL TYPE |
| Mounting Facility Pattern | FOUR POSITION RECTANGULAR |
| Adjustment Device Type and Quantity | 1 MOTOR |
| Center to Center Distance Between Mounting Facilities Parallel to Length | 1.820 INCHES NOMINAL IN |
| Overall Attenuation Range in Decibels | +0.0 TO 40.0 |
| Voltage Standing Wave Ratio | 2.00 |
| Unthreaded Mounting Hole Diameter | 0.125 INCHES NOMINAL IN |
| Scale Linearity | LINEAR |
| Attenuation Variation Method | CONTINUOUS |
| Operating Temp Range | +0.0 TO 65.0 CELSIUS DEGC |
| Center to Center Distance Between Mounting Facilities Parallel to Width | 0.950 INCHES NOMINAL IN |
| Application Design | TRANSMISSION LINE |
| Terminal Type and Quantity | 3 TAB, SOLDER LUG |
| Power Rating | 2.0 WATTS AVERAGE AND 10.0 WATTS PEAK |
| Coaxial Connector Series Designation | SMA |
| 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 |
|---|---|
| MD-40K2D | Caes Mission Systems Llc (USA) |
| Reference | Meaning |
|---|---|
| CA3242 | 5/9 Secondary reference Emberguard Solutions |
| 801683-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5985-01-023-2669 is a Attenuator,variable, manufactured by Caes Mission Systems Llc, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-01-023-2669 has 1 manufacturer part number on file: MD-40K2D (Caes Mission Systems Llc).
1 possible match (shared part number, not a government interchangeability claim): 6145-01-652-2292. Verify interchangeability with system specifications before substitution.
Key specifications for MD-40K2D: Impedance Rating in Ohms: 90.0 INPUT-OUTPUT; Mounting Facility Type and Quantity: 4 UNTHREADED HOLE(S); Overall Height: 1.000 INCHES NOMINAL IN; Frequency Range: 16.300 GIGAHERTZ MINIMUM AND 17.300 GIGAHERTZ MAXIMUM. 18 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 5985-01-023-2669 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.