The Frequency Multiplier, cataloged under National Stock Number 5865-01-439-4034, 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 Caes Systems Llc Div Missile Systems Division. Government technical data includes 6 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5865-01-439-4034 |
| Primary Part Number | FD25 |
| Item Name | Frequency Multiplier |
| FSC / FSG | 5865 / 58 — Electronic Countermeasures, Counter-countermeasures and Quick Reaction Capability Equipment |
| Manufacturer | Caes Systems Llc Div Missile Systems Division |
| Status | ACTIVE |
| Circuit Construction Type | SOLID STATE |
| Inclosure Type | HERMETICALLY SEALED |
| Overall Diameter | 0.510 INCHES NOMINAL IN |
| Basic Shape Style | IRREGULAR |
| Average Life Measurement | NOT RATED |
| Installation Design | MODULE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| FD25 PRIMARY | Caes Systems Llc Div Missile Systems Division (USA) |
| Reference | Meaning |
|---|---|
| WJ-FD25 | 5/9 Secondary reference Watkins-Johnson Co |
NSN 5865-01-439-4034 is a Frequency Multiplier, manufactured by Caes Systems Llc Div Missile Systems Division, classified under FSC 5865, Electronic Countermeasures, Counter-countermeasures and Quick Reaction Capability Equipment. Status: active.
NSN 5865-01-439-4034 has 1 manufacturer part number on file: FD25 (Caes Systems Llc Div Missile Systems Division).
Key specifications for FD25: Circuit Construction Type: SOLID STATE; Overall Height: 0.460 INCHES NOMINAL IN; Inclosure Type: HERMETICALLY SEALED; Overall Diameter: 0.510 INCHES NOMINAL IN. 6 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.
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.