The Delay,special, cataloged under National Stock Number 5840-01-429-8783, is classified within Federal Supply Class 5840 (Radar Equipment, Except Airborne) of the Communication, Detection, and Coherent Radiation Equipment group. The manufacturer of record is Spectrum Sei Microwave, Inc.. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5840-01-429-8783 |
| Primary Part Number | MFX-3-A65715-15P/P |
| Item Name | Delay,special |
| FSC / FSG | 5840 / 58 — Radar Equipment, Except Airborne |
| Manufacturer | Spectrum Sei Microwave, Inc. |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| MFX-3-A65715-15P/P | Spectrum Sei Microwave, Inc. (USA) |
| DDU37F-30M | Data Delay Devices (USA) |
| Reference | Meaning |
|---|---|
| 1A20966H02 | C/1 Advisory reference — outside the item-of-supply concept Northrop Grumman Support Services Corp |
| 1A20966H02 | 3/9 Design control — primary reference U.S. Government activity |
NSN 5840-01-429-8783 is a Delay,special, manufactured by Spectrum Sei Microwave, Inc., classified under FSC 5840, Radar Equipment, Except Airborne. Status: active.
NSN 5840-01-429-8783 has 2 manufacturer part numbers on file: MFX-3-A65715-15P/P (Spectrum Sei Microwave, Inc.), DDU37F-30M (Data Delay Devices).
Key specifications for MFX-3-A65715-15P/P: End Item Identification: AIR ROUTE SURVEILLANCE RADAR MODEL 4 (ARSR4). 0 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
NSN 5840-01-429-8783 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.