The Attenuator,variable, cataloged under National Stock Number 5985-00-562-8844, 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 Merrimac Industries, Inc. Government technical data includes 8 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5985-00-562-8844 |
| Primary Part Number | AU25 |
| Item Name | Attenuator,variable |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Merrimac Industries, Inc |
| Status | ACTIVE |
| Impedance Rating in Ohms | 50.0 INPUT-OUTPUT |
| Mounting Facility Type and Quantity | 4 TERMINAL |
| Frequency Range | 5.350 GIGAHERTZ MINIMUM AND 5.950 GIGAHERTZ MAXIMUM |
| Overall Attenuation Range in Decibels | +0.0 TO 20.0 |
| Overall Attenuation Accuracy in Decibels | -3.00 TO 3.00 |
| Attenuation Variation Method | CONTINUOUS |
| Application Design | TRANSMISSION LINE |
| Power Rating | 4.0 WATTS AVERAGE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| AU25 PRIMARY | Merrimac Industries, Inc (USA) |
| Reference | Meaning |
|---|---|
| 754088 | 1/2 Source control — Government-approved source U.S. Government activity |
NSN 5985-00-562-8844 is a Attenuator,variable, manufactured by Merrimac Industries, Inc, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-00-562-8844 has 1 manufacturer part number on file: AU25 (Merrimac Industries, Inc).
1 possible match (shared part number, not a government interchangeability claim): 5985-01-032-0127. Verify interchangeability with system specifications before substitution.
Key specifications for AU25: Impedance Rating in Ohms: 50.0 INPUT-OUTPUT; Mounting Facility Type and Quantity: 4 TERMINAL; Frequency Range: 5.350 GIGAHERTZ MINIMUM AND 5.950 GIGAHERTZ MAXIMUM; Overall Attenuation Range in Decibels: +0.0 TO 20.0. 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.
NSN 5985-00-562-8844 has DEMIL Code B. 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.