The Attenuator,variable, cataloged under National Stock Number 5985-01-056-4018, 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 Raytheon Company Dba Raytheon Co. Government technical data includes 19 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 5985-01-056-4018 |
| Primary Part Number | 911661-1 |
| Item Name | Attenuator,variable |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Raytheon Company Dba Raytheon Co |
| Status | ACTIVE |
| Insertion Loss at Minimum Attenuation in Maximum Decibels | 0.3 |
| Impedance Rating in Ohms | 50.0 INPUT-OUTPUT |
| Mounting Facility Type and Quantity | 4 UNTHREADED HOLE(S) |
| Frequency Range | 420.000 MEGAHERTZ MINIMUM AND 450.000 MEGAHERTZ MAXIMUM |
| Body Style | COAXIAL TYPE |
| Mounting Facility Pattern | FOUR POSITION RECTANGULAR |
| Adjustment Device Type and Quantity | 1 KNOB |
| Center to Center Distance Between Mounting Facilities Parallel to Length | 5.280 INCHES NOMINAL IN |
| Overall Attenuation Range in Decibels | +0.00 TO 3.05 |
| Voltage Standing Wave Ratio | 1.20 |
| Criticality Code Justification | FEAT |
| Unthreaded Mounting Hole Diameter | 0.186 INCHES MINIMUM AND 0.192 INCHES MAXIMUM IN |
| Attenuation Variation Method | CONTINUOUS |
| Operating Temp Range | +13.0 TO 35.0 CELSIUS DEGC |
| Center to Center Distance Between Mounting Facilities Parallel to Width | 3.665 INCHES NOMINAL IN |
| Application Design | TRANSMISSION LINE |
| Terminal Type and Quantity | 2 CONNECTOR, COAXIAL, FEMALE |
| Power Rating | 45.0 WATTS AVERAGE |
| Coaxial Connector Series Designation | N |
| 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 |
|---|---|
| A-3688 | Rlc Electronics, Inc (USA) |
| AR3428 | Antenna & Radome Research Associates Corp Dba Arra Inc Div Arra Inc (USA) |
| 911661-1 | Raytheon Company (USA) |
| 911661-1 PRIMARY | Raytheon Company Dba Raytheon Co (USA) |
| Reference | Meaning |
|---|---|
| 911661-1 | 5/9 Secondary reference Raytheon Company Div Corp |
| 911661 | 5/9 Secondary reference Raytheon Company Div Corp |
NSN 5985-01-056-4018 is a Attenuator,variable, manufactured by Raytheon Company Dba Raytheon Co, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-01-056-4018 has 4 manufacturer part numbers on file: A-3688 (Rlc Electronics, Inc), AR3428 (Antenna & Radome Research Associates Corp Dba Arra Inc Div Arra Inc), 911661-1 (Raytheon Company), 911661-1 (Raytheon Company Dba Raytheon Co).
2 possible matches (shared part number, not a government interchangeability claim): 5310-01-292-6223, 5905-01-494-6201. Verify interchangeability with system specifications before substitution.
Key specifications for 911661-1: Insertion Loss at Minimum Attenuation in Maximum Decibels: 0.3; Impedance Rating in Ohms: 50.0 INPUT-OUTPUT; Mounting Facility Type and Quantity: 4 UNTHREADED HOLE(S); Overall Height: 6.000 INCHES NOMINAL IN. 19 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 5985-01-056-4018 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.