The Attenuator,fixed, cataloged under National Stock Number 5985-01-209-9589, 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 Cinch Connectivity Solutions Inc. Government technical data includes 16 specifications, cited from the U.S. Government catalog. The record lists 7 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 5985-01-209-9589 |
| Primary Part Number | ATT-0290-12-SMA-02 |
| Item Name | Attenuator,fixed |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Cinch Connectivity Solutions Inc |
| Status | CANCELLED |
| Frequency Range | 0.000 HERTZ MINIMUM AND 18.000 GIGAHERTZ MAXIMUM |
| Body Style | ROUND, TERMINAL/TERMINALS IN OPPOSITE SURFACE |
| Overall Diameter | 0.360 INCHES NOMINAL IN |
| Voltage Standing Wave Ratio | 1.07 |
| Input Impedance Rating in Ohms | 50.0 |
| Mounting Method | CONNECTOR |
| Rf Signal Attenuation in Decibels | 12.0 |
| Attenuation Accuracy in Decibels | -0.50 TO 0.50 |
| Operating Temp Range | -65.0 TO 125.0 CELSIUS DEGC |
| Voltage Standing Wave Ratio Frequency Range | +0.0 TO 18.0 GIGAHERTZ |
| Application Design | TRANSMISSION LINE |
| Material | STEEL CORROSION RESISTING BODY |
| Power Rating | 2.0 WATTS AVERAGE |
| Terminal Type and Quantity | 2 CONNECTOR |
| Output Impedance Rating in Ohms | 50.0 |
| Coaxial Connector Series Designation | SMA |
| Acquisition Status | CANCELLED |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 290-12DB | Cinch Connectivity Solutions Inc (USA) |
| 18A-12DB | Spectrum Control, Inc. (USA) |
| ATT-0290-12-SMA-02 PRIMARY | Cinch Connectivity Solutions Inc (USA) |
| 570997-123 | Raytheon Company (USA) |
| MDC90034-12 | Dal-Tech Devices, Inc. Dba Dal-Tech Devices Inc Div Dal-Tec Devices, Inc (USA) |
| 18A-12 | Spectrum Control, Inc. (USA) |
| 570997-123 | Raytheon Company Dba Raytheon Co (USA) |
| Reference | Meaning |
|---|---|
| 290-12-0.5DB | 5/9 Secondary reference Cinch Connectivity Solutions Inc |
| 290-12 | 5/9 Secondary reference Cinch Connectivity Solutions Inc |
| 570997-123 | 5/9 Secondary reference Raytheon Company Div Corp |
NSN 5985-01-209-9589 is a Attenuator,fixed, manufactured by Cinch Connectivity Solutions Inc, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: cancelled.
NSN 5985-01-209-9589 has 7 manufacturer part numbers on file: 290-12DB (Cinch Connectivity Solutions Inc), 18A-12DB (Spectrum Control, Inc.), ATT-0290-12-SMA-02 (Cinch Connectivity Solutions Inc), 570997-123 (Raytheon Company), MDC90034-12 (Dal-Tech Devices, Inc. Dba Dal-Tech Devices Inc Div Dal-Tec Devices, Inc) and 2 more.
3 possible matches (shared part number, not a government interchangeability claim): 5325-01-399-3818, 5120-01-430-8240, 5965-01-580-5910. Verify interchangeability with system specifications before substitution.
Key specifications for ATT-0290-12-SMA-02: Frequency Range: 0.000 HERTZ MINIMUM AND 18.000 GIGAHERTZ MAXIMUM; Body Style: ROUND, TERMINAL/TERMINALS IN OPPOSITE SURFACE; Overall Diameter: 0.360 INCHES NOMINAL IN; Voltage Standing Wave Ratio: 1.07. 16 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 5985-01-209-9589 has DEMIL Code D. Demilitarization may be required before disposal or transfer to non-military entities.
NSN 5985-01-209-9589 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.
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.