The Attenuator,fixed, cataloged under National Stock Number 5985-01-356-9988, 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 Ballantine Laboratories Inc. Government technical data includes 4 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 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 | 5985-01-356-9988 |
| Primary Part Number | 1340A |
| Item Name | Attenuator,fixed |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Ballantine Laboratories Inc |
| Status | ACTIVE |
| FSC Application Data | ANTENNAS, WAVEGUIDES, AND RELATED EQUIPMENT |
| Frequency Range | 0.000 HERTZ MINIMUM AND 40.000 KILOHERTZ MAXIMUM |
| Voltage Standing Wave Ratio Frequency Range | +0.0 TO 40.0 KILOHERTZ |
| Application Design | TRANSMISSION LINE |
| 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 |
|---|---|
| 1340A PRIMARY | Ballantine Laboratories Inc (USA) |
NSN 5985-01-356-9988 is a Attenuator,fixed, manufactured by Ballantine Laboratories Inc, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-01-356-9988 has 1 manufacturer part number on file: 1340A (Ballantine Laboratories Inc).
1 possible match (shared part number, not a government interchangeability claim): 1680-01-594-2724. Verify interchangeability with system specifications before substitution.
Key specifications for 1340A: FSC Application Data: ANTENNAS, WAVEGUIDES, AND RELATED EQUIPMENT; Frequency Range: 0.000 HERTZ MINIMUM AND 40.000 KILOHERTZ MAXIMUM; Voltage Standing Wave Ratio Frequency Range: +0.0 TO 40.0 KILOHERTZ; Application Design: TRANSMISSION LINE. 4 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.