The Attenuator,fixed, cataloged under National Stock Number 5985-01-522-4929, 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 Robinson Laboratories Inc Dba Herley New England. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-01-522-4929 |
| Primary Part Number | MP4278 |
| Item Name | Attenuator,fixed |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Robinson Laboratories Inc Dba Herley New England |
| Status | ACTIVE |
| 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 |
|---|---|
| MP4278 | Robinson Laboratories Inc Dba Herley New England (USA) |
| MODEL 1825 | General Microwave Corporation Div Kratos Microwave Electronics (USA) |
| Reference | Meaning |
|---|---|
| G581765-1 | 3/9 Design control — primary reference Raytheon Co |
| G581765-1 | C/1 Advisory reference — outside the item-of-supply concept Raytheon Company |
NSN 5985-01-522-4929 is a Attenuator,fixed, manufactured by Robinson Laboratories Inc Dba Herley New England, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-01-522-4929 has 2 manufacturer part numbers on file: MP4278 (Robinson Laboratories Inc Dba Herley New England), MODEL 1825 (General Microwave Corporation Div Kratos Microwave Electronics).
Key specifications for MP4278: Special Features: COUPLER/ATTENUATOR; End Item Identification: DIGITAL TERMINAL RADAR AIRPORT SURVEILLANCE RADAR (ASR11). 0 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.