The Attenuator,variable, cataloged under National Stock Number 5985-00-064-3958, 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 L3harris Interstate Electronics Corporation. Government technical data includes 19 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5985-00-064-3958 |
| Primary Part Number | 499-045-023 |
| Item Name | Attenuator,variable |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | L3harris Interstate Electronics Corporation |
| Status | ACTIVE |
| Shaft Type | ROUND |
| Bushing Length | 0.375 INCHES NOMINAL IN |
| Impedance Rating in Ohms | 500.0 INPUT-OUTPUT |
| Body Diameter | 1.125 INCHES NOMINAL IN |
| Mounting Facility Type and Quantity | 1 THREADED BUSHING |
| Shaft Diameter | 0.125 INCHES NOMINAL IN |
| Body Style | CYLINDRICAL W/SIDE TERMINALS |
| Adjustment Device Type and Quantity | 1 SHAFT |
| Overall Attenuation Range in Decibels | +0.0 TO 30.0 |
| Mounting Facility Screw Thread Series Designator | UNEF |
| Attenuation Variation Method | CONTINUOUS |
| Schematic Diagram Designator | "T" |
| Mounting Thread Quantity | 32 PER INCH |
| Shaft Length | 2.000 INCHES NOMINAL IN |
| Body Length | 1.156 INCHES NOMINAL IN |
| Mounting Facility Nominal Screw Thread Diameter | 0.375 INCHES IN |
| Application Design | AUDIO |
| Terminal Type and Quantity | 3 TAB, SOLDER LUG |
| Power Rating | 2.0 WATTS AVERAGE |
| 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 |
|---|---|
| 499-045-023 | L3harris Interstate Electronics Corporation (USA) |
| CIT43-500 | Clarostat Sensors and Controls (USA) |
| Reference | Meaning |
|---|---|
| 351051 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5985-00-064-3958 is a Attenuator,variable, manufactured by L3harris Interstate Electronics Corporation, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-00-064-3958 has 2 manufacturer part numbers on file: 499-045-023 (L3harris Interstate Electronics Corporation), CIT43-500 (Clarostat Sensors and Controls).
1 possible match (shared part number, not a government interchangeability claim): 3417-01-721-7668. Verify interchangeability with system specifications before substitution.
Key specifications for 499-045-023: Shaft Type: ROUND; Bushing Length: 0.375 INCHES NOMINAL IN; Impedance Rating in Ohms: 500.0 INPUT-OUTPUT; Body Diameter: 1.125 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.
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.