The Byistor, cataloged under National Stock Number 5865-01-080-7691, 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 Varian Associates Inc Communications Transistor Div. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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.
| Item Name | Byistor |
| FSC / FSG | 5865 — Electronic Countermeasures, Counter-countermeasures and Quick Reaction Capability Equipment (FSG 58) |
| Manufacturers | Varian Associates Inc Communications Transistor Div (CAGE 50155) |
| Parameter | Value |
|---|---|
| NSN | 5865-01-080-7691 |
| Primary Part Number | BY1-1 |
| Item Name | Byistor |
| FSC / FSG | 5865 / 58 — Electronic Countermeasures, Counter-countermeasures and Quick Reaction Capability Equipment |
| Manufacturer | Varian Associates Inc Communications Transistor Div |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| BY1-1 PRIMARY | Varian Associates Inc Communications Transistor Div (USA) |
| Reference | Meaning |
|---|---|
| BYI-1 | 5/2 Secondary reference U.S. Government activity |
| BY1-1 | 5/9 Secondary reference U.S. Government activity |
NSN 5865-01-080-7691 is a Byistor, manufactured by Varian Associates Inc Communications Transistor Div, classified under FSC 5865, Electronic Countermeasures, Counter-countermeasures and Quick Reaction Capability Equipment. Status: active.
NSN 5865-01-080-7691 has 1 manufacturer part number on file: BY1-1 (Varian Associates Inc Communications Transistor Div).
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 5865-01-080-7691 has DEMIL Code Q. 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.