The Attenuator,variable, cataloged under National Stock Number 5985-00-488-3492, 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 Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier. Government technical data includes 21 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5985-00-488-3492 |
| Primary Part Number | 2921080 |
| Item Name | Attenuator,variable |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| Status | ACTIVE |
| Shaft Type | ROUND |
| Insertion Loss at Minimum Attenuation in Maximum Decibels | 0.2 |
| Bushing Length | 0.937 INCHES NOMINAL IN |
| Impedance Rating in Ohms | 50.0 INPUT-OUTPUT |
| Body Diameter | 1.500 INCHES NOMINAL IN |
| Mounting Facility Type and Quantity | 2 CONNECTOR |
| Frequency Range | 0.000 HERTZ MINIMUM AND 500.000 MEGAHERTZ MAXIMUM |
| Shaft Diameter | 0.125 INCHES NOMINAL IN |
| Body Style | CYLINDRICAL W/SIDE TERMINALS |
| Attenuation Accuracy Reference Frequency | 30.0 MEGAHERTZ |
| Adjustment Device Type and Quantity | 1 SHAFT |
| Overall Attenuation Range in Decibels | +0.0 TO 60.0 |
| Voltage Standing Wave Ratio | 1.10 AND 1.20 |
| Attenuation Variation Method | CONTINUOUS |
| Shaft Length | 0.563 INCHES NOMINAL IN |
| Body Length | 3.000 INCHES NOMINAL IN |
| Operating Temp Range | -20.0 TO 125.0 CELSIUS DEGC |
| Application Design | TRANSMISSION LINE |
| Terminal Type and Quantity | 2 CONNECTOR, COAXIAL, FEMALE |
| Power Rating | 0.5 MILLIWATTS AVERAGE |
| Coaxial Connector Series Designation | BNC |
| 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 |
|---|---|
| 2921080 | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
| 562397 | Lockheed Martin Corporation Div Rms - Mitchel Field (USA) |
| Reference | Meaning |
|---|---|
| LA517 | 3/9 Design control — primary reference Trilithic, Inc. |
NSN 5985-00-488-3492 is a Attenuator,variable, manufactured by Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-00-488-3492 has 2 manufacturer part numbers on file: 2921080 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier), 562397 (Lockheed Martin Corporation Div Rms - Mitchel Field).
1 possible match (shared part number, not a government interchangeability claim): 5360-00-598-4974. Verify interchangeability with system specifications before substitution.
Key specifications for 2921080: Shaft Type: ROUND; Insertion Loss at Minimum Attenuation in Maximum Decibels: 0.2; Bushing Length: 0.937 INCHES NOMINAL IN; Impedance Rating in Ohms: 50.0 INPUT-OUTPUT. 21 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.