The Receiving Set,countermeasures, cataloged under National Stock Number 5865-01-424-6959, is classified within Federal Supply Class 5865 (Electronic Countermeasures, Counter-countermeasures and Quick Reaction Capability Equipment) of the Communication, Detection, and Coherent Radiation Equipment group. The manufacturer of record is Lockheed Martin Corporation Div Rotary and Mission Systems. Government technical data includes 2 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5865-01-424-6959 |
| Primary Part Number | 191A900-1 |
| Item Name | Receiving Set,countermeasures |
| FSC / FSG | 5865 / 58 — Electronic Countermeasures, Counter-countermeasures and Quick Reaction Capability Equipment |
| Manufacturer | Lockheed Martin Corporation Div Rotary and Mission Systems |
| Status | ACTIVE |
| End Item Name | EST CHALLENGER AIRCRAFT |
| Nonsupply Items and Quantities | 03640, 6511100-3 R-5158/ALR-504 RECEIVER COUNTERMEASURES 2; 03640 6510700-3 CM-5016/ALR-504 COMPARATOR SIGNAL 1; 03640 6511050-3 AS-5221/ALR-504 ANTENNA 8 CM |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 191A900-1 PRIMARY | Lockheed Martin Corporation Div Rotary and Mission Systems (USA) |
| Reference | Meaning |
|---|---|
| AN/ALR-504 | 5/2 Secondary reference U.S. Government activity |
NSN 5865-01-424-6959 is a Receiving Set,countermeasures, manufactured by Lockheed Martin Corporation Div Rotary and Mission Systems, classified under FSC 5865, Electronic Countermeasures, Counter-countermeasures and Quick Reaction Capability Equipment. Status: active.
NSN 5865-01-424-6959 has 1 manufacturer part number on file: 191A900-1 (Lockheed Martin Corporation Div Rotary and Mission Systems).
Key specifications for 191A900-1: End Item Name: EST CHALLENGER AIRCRAFT; Nonsupply Items and Quantities: 03640, 6511100-3 R-5158/ALR-504 RECEIVER COUNTERMEASURES 2; 03640 6510700-3 CM-5016/ALR-504 COMPARATOR SIGNAL 1; 03640 6511050-3 AS-5221/ALR-504 ANTENNA 8 CM. 2 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 5865-01-424-6959 has DEMIL Code D. 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.