The Mixer,crystal,coaxial, cataloged under National Stock Number 5985-00-427-5189, 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 Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-00-427-5189 |
| Primary Part Number | 2921987 |
| Item Name | Mixer,crystal,coaxial |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| Status | ACTIVE |
| Local Oscillator Input Terminal Designator | TYPE SMA |
| FSC Application Data | ANTENNAS,WAVEGUIDES,AND RELATED EQUIPMENT |
| Signal Input Terminal Designator | TYPE SMA |
| Frequency Range Rating | +4.0 TO 8.0 GIGAHERTZ |
| Signal Output Terminal Designator | TYPE SMA |
| Insertion Loss in Decibels | 8.5 |
| 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 |
|---|---|
| 2921987 PRIMARY | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
| MX8141 | Frequency Electronics Inc (USA) |
| Reference | Meaning |
|---|---|
| MX800 | 5/9 Secondary reference Fei Microwave Inc |
| 562626 | 5/1 Secondary reference Lockheed Martin Corporation Div Rms - Mitchel Field |
| MX8141 | 5/9 Secondary reference Fei Microwave Inc |
NSN 5985-00-427-5189 is a Mixer,crystal,coaxial, manufactured by Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-00-427-5189 has 2 manufacturer part numbers on file: 2921987 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier), MX8141 (Frequency Electronics Inc).
3 possible matches (shared part number, not a government interchangeability claim): 5340-01-386-1718, 6730-01-437-6128, 7025-01-664-3120. Verify interchangeability with system specifications before substitution.
Key specifications for 2921987: Local Oscillator Input Terminal Designator: TYPE SMA; Overall Height: 1.630 INCHES NOMINAL IN; FSC Application Data: ANTENNAS,WAVEGUIDES,AND RELATED EQUIPMENT; Signal Input Terminal Designator: TYPE SMA. 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 5985-00-427-5189 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.