The Attenuator,variable, cataloged under National Stock Number 5985-00-476-8271, 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 24 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-00-476-8271 |
| Primary Part Number | 10658397 |
| Item Name | Attenuator,variable |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Us Army Aviation and Missile Command |
| Status | ACTIVE |
| Insertion Loss at Minimum Attenuation in Maximum Decibels | 1.0 |
| Impedance Rating in Ohms | 50.0 INPUT-OUTPUT |
| Mounting Facility Type and Quantity | 4 SLOT |
| Frequency Range | 50.000 MEGAHERTZ MINIMUM AND 70.000 MEGAHERTZ MAXIMUM |
| Body Style | COAXIAL TYPE |
| Attenuation Accuracy Reference Frequency | 70.0 MEGAHERTZ |
| Mounting Facility Pattern | FOUR POSITION RECTANGULAR |
| Mounting Slot Length | 0.250 INCHES NOMINAL IN |
| Segment Attenuation Accuracy in Decibels | -0.10 TO 0.10 AND -0.20 TO 0.20 AND -0.30 TO 0.30 AND -0.60 TO 0.60 |
| Adjustment Device Type and Quantity | 9 LEVER |
| Center to Center Distance Between Mounting Facilities Parallel to Length | 4.000 INCHES NOMINAL IN |
| Overall Attenuation Range in Decibels | +0.0 TO 20.0 |
| Voltage Standing Wave Ratio | 1.15 |
| Segment Attenuation Range in Decibels | +0.50 TO 3.00 AND +3.00 TO 6.00 AND +6.00 TO 10.00 AND +10.00 TO 20.00 |
| Overall Attenuation Accuracy in Decibels | -0.10 TO 0.60 |
| Attenuation Per Step in Decibels | 0.5 AND 1.0 AND 2.0 AND 3.0 AND 6.0 AND 10.0 AND 20.0 |
| Attenuation Variation Method | STEPPED |
| Center to Center Distance Between Mounting Facilities Parallel to Width | 2.000 INCHES NOMINAL IN |
| Application Design | TRANSMISSION LINE |
| Terminal Type and Quantity | 2 CONNECTOR, COAXIAL, FEMALE |
| Power Rating | 500.0 MILLIWATTS AVERAGE |
| Step Position Quantity | 7 |
| Coaxial Connector Series Designation | C |
| Mounting Slot Width | 0.156 INCHES NOMINAL IN |
| 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 |
|---|---|
| 10658397 PRIMARY | Us Army Aviation and Missile Command (USA) |
| Reference | Meaning |
|---|---|
| MT511 | 5/9 Secondary reference Teledyne Wireless, Llc Dba Teledyne Microwave Solutions |
NSN 5985-00-476-8271 is a Attenuator,variable, manufactured by Us Army Aviation and Missile Command, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-00-476-8271 has 1 manufacturer part number on file: 10658397 (Us Army Aviation and Missile Command).
Key specifications for 10658397: Insertion Loss at Minimum Attenuation in Maximum Decibels: 1.0; Impedance Rating in Ohms: 50.0 INPUT-OUTPUT; Mounting Facility Type and Quantity: 4 SLOT; Overall Height: 2.250 INCHES NOMINAL IN. 24 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.