The Attenuator,fixed, cataloged under National Stock Number 5985-00-491-6446, 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 16 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5985-00-491-6446 |
| Primary Part Number | 10674774 |
| Item Name | Attenuator,fixed |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Us Army Aviation and Missile Command |
| Status | ACTIVE |
| Waveguide Flange Type | COVER |
| Mounting Hole/stud Quantity | 4 |
| Inside Width | 1.003 INCHES NOMINAL IN |
| Body Style | RECTANGULAR, TERMINAL/TERMINALS ON OPPOSITE SURFACES |
| Voltage Standing Wave Ratio | 1.00 AND 1.10 |
| Waveguide Flange Designation | UG-39/U |
| Mounting Method | TERMINAL WITH MOUNTING HOLES |
| Rf Signal Attenuation in Decibels | 12.0 |
| Attenuation Accuracy in Decibels | -0.50 TO 0.50 |
| Unthreaded Mounting Hole Diameter | 0.177 INCHES NOMINAL IN |
| Center to Center Distance Between Mounting Facilities Parallel to Height | 1.280 INCHES NOMINAL IN |
| Waveguide Designation | RG-52/U |
| Center to Center Distance Between Mounting Facilities Parallel to Width | 1.220 INCHES NOMINAL IN |
| Application Design | WAVEGUIDE |
| Inside Height | 0.505 INCHES NOMINAL IN |
| Terminal Type and Quantity | 2 FLANGE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
NSN 5985-00-491-6446 is a Attenuator,fixed, manufactured by Us Army Aviation and Missile Command, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-00-491-6446 has 2 manufacturer part numbers on file: 447326 (Raytheon Company Dba Raytheon Co), 10674774 (Us Army Aviation and Missile Command).
1 possible match (shared part number, not a government interchangeability claim): 5340-00-976-4124. Verify interchangeability with system specifications before substitution.
Key specifications for 10674774: Waveguide Flange Type: COVER; Overall Height: 1.620 INCHES NOMINAL IN; Mounting Hole/stud Quantity: 4; Inside Width: 1.003 INCHES NOMINAL IN. 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.
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.