The Attenuator,fixed, cataloged under National Stock Number 5985-00-491-2299, 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 Us Army Aviation and Missile Command. Government technical data includes 14 specifications, cited from the U.S. Government catalog. The record lists 4 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 6 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-00-491-2299 |
| Primary Part Number | 10670748 |
| Item Name | Attenuator,fixed |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Us Army Aviation and Missile Command |
| Status | ACTIVE |
| Frequency Range | 0.000 HERTZ MINIMUM AND 1.500 MEGAHERTZ MAXIMUM |
| Body Style | ROUND, TERMINAL/TERMINALS IN OPPOSITE SURFACE |
| Overall Diameter | 0.560 INCHES NOMINAL IN |
| Input Impedance Rating in Ohms | 600.0 |
| Mounting Method | TERMINAL |
| Rf Signal Attenuation in Decibels | 40.0 |
| Criticality Code Justification | FEAT |
| Connection Type Per Function | FEMALE INPUT AND MALE OUTPUT |
| Operating Temp Range | -40.0 TO 85.0 CELSIUS DEGC |
| Application Design | TRANSMISSION LINE |
| Power Rating | 500.0 MILLIWATTS AVERAGE |
| Terminal Type and Quantity | 2 CONNECTOR |
| Output Impedance Rating in Ohms | 25.0 |
| Coaxial Connector Series Designation | BNC |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| 1912000 | Sielman S.a. (GRC) |
| 10670748 PRIMARY | Us Army Aviation and Missile Command (USA) |
| 25Z600-466 | Alan Industries Inc (USA) |
| 25Z600-466 | Professional Electronics Co Inc. Dba Hallicrafters (USA) |
| Reference | Meaning |
|---|---|
| 10671 | 5/9 Secondary reference Meggitt (new Hampshire), Inc |
NSN 5985-00-491-2299 is a Attenuator,fixed, manufactured by Us Army Aviation and Missile Command, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-00-491-2299 has 4 manufacturer part numbers on file: 1912000 (Sielman S.a.), 10670748 (Us Army Aviation and Missile Command), 25Z600-466 (Alan Industries Inc), 25Z600-466 (Professional Electronics Co Inc. Dba Hallicrafters).
6 possible matches (shared part number, not a government interchangeability claim): 5935-00-636-8409, 6610-00-759-0306, 1650-00-946-5473. Verify interchangeability with system specifications before substitution.
Key specifications for 10670748: Frequency Range: 0.000 HERTZ MINIMUM AND 1.500 MEGAHERTZ MAXIMUM; Body Style: ROUND, TERMINAL/TERMINALS IN OPPOSITE SURFACE; Overall Diameter: 0.560 INCHES NOMINAL IN; Input Impedance Rating in Ohms: 600.0. 14 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 5985-00-491-2299 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.