The Mixer,crystal,coaxial, cataloged under National Stock Number 5985-00-491-6579, 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 Northrop Grumman Systems Corporation Dba Electronic Systems. Government technical data includes 7 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-00-491-6579 |
| Primary Part Number | 990C699H01 |
| Item Name | Mixer,crystal,coaxial |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Northrop Grumman Systems Corporation Dba Electronic Systems |
| Status | ACTIVE |
| Local Oscillator Input Terminal Designator | BNC |
| Signal Input Terminal Designator | BNC |
| Frequency Range Rating | +0.2 TO 500.0 MEGAHERTZ |
| Signal Output Terminal Designator | BNC |
| Crystal Nominal Current Rating in Milliamperes | 20.0 |
| Insertion Loss in Decibels | 6.5 |
| Local Oscillator Input Adjustability | NONADJUSTABLE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 990C699H01 PRIMARY | Northrop Grumman Systems Corporation Dba Electronic Systems (USA) |
| Reference | Meaning |
|---|---|
| M1BNC | 5/9 Secondary reference Watkins-Johnson Co |
| WJM1BNC | 5/9 Secondary reference Watkins-Johnson Co |
NSN 5985-00-491-6579 is a Mixer,crystal,coaxial, manufactured by Northrop Grumman Systems Corporation Dba Electronic Systems, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-00-491-6579 has 1 manufacturer part number on file: 990C699H01 (Northrop Grumman Systems Corporation Dba Electronic Systems).
Key specifications for 990C699H01: Local Oscillator Input Terminal Designator: BNC; Overall Height: 1.505 INCHES NOMINAL IN; Signal Input Terminal Designator: BNC; Overall Length: 1.950 INCHES NOMINAL IN. 7 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.
NSN 5985-00-491-6579 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.