The Attenuator,variable, cataloged under National Stock Number 5985-00-686-3986, 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 Telephonics Corp/prd Instruments. Government technical data includes 8 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-00-686-3986 |
| Primary Part Number | 185BS1 |
| Item Name | Attenuator,variable |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Telephonics Corp/prd Instruments |
| Status | ACTIVE |
| Mounting Facility Type and Quantity | 4 TERMINAL |
| Overall Attenuation Range in Decibels | +0.0 TO 40.0 |
| Voltage Standing Wave Ratio | 15.00 |
| Unthreaded Mounting Hole Diameter | 0.169 INCHES NOMINAL IN |
| Attenuation Variation Method | CONTINUOUS |
| Application Design | WAVEGUIDE |
| Terminal Type and Quantity | 2 FLANGE |
| Power Rating | 1.0 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 |
NSN 5985-00-686-3986 is a Attenuator,variable, manufactured by Telephonics Corp/prd Instruments, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-00-686-3986 has 2 manufacturer part numbers on file: 185BS1 (Telephonics Corp/prd Instruments), 9138283 (Us Army Aviation and Missile Command).
Key specifications for 185BS1: Mounting Facility Type and Quantity: 4 TERMINAL; Overall Attenuation Range in Decibels: +0.0 TO 40.0; Voltage Standing Wave Ratio: 15.00; Unthreaded Mounting Hole Diameter: 0.169 INCHES NOMINAL IN. 8 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.