The Coupler,directional, cataloged under National Stock Number 5985-00-155-4200, 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 Meca Electronics Inc. Government technical data includes 5 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-00-155-4200 |
| Primary Part Number | SM-B-651399 |
| Item Name | Coupler,directional |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Meca Electronics Inc |
| Status | ACTIVE |
| Usage Design | MAIN LINE AND SECONDARY LINE TERMINAL FITTING |
| Power Loss in Decibels | 0.25 |
| Design Type | UNIDIRECTIONAL |
| Radio Frequency Rating | 4.4 GIGAHERTZ MINIMUM AND 5.0 GIGAHERTZ MAXIMUM |
| Unit Type | COAXIAL LINE |
| 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 |
|---|---|
| SM-B-651399 | Meca Electronics Inc (USA) |
| SM-B-651399 | L3harris Technologies, Inc. Dba Harris Corporation (USA) |
| Reference | Meaning |
|---|---|
| SM-B-651399 | 5/9 Secondary reference F E L Corp |
| SM-B-651399 | 3/2 Design control — primary reference U.S. Government activity |
| SM-B-651399 | 5/9 Secondary reference Ducommun Labarge Technologies, Inc Dba Ducommun Labarge Technologies, Inc |
| SM-B-651399 | 5/9 Secondary reference Itt Industries Inc Itt Aerospace Communications Div East |
| SM-B-651399 | 5/9 Secondary reference Radite Microwave Co Inc |
NSN 5985-00-155-4200 is a Coupler,directional, manufactured by Meca Electronics Inc, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-00-155-4200 has 2 manufacturer part numbers on file: SM-B-651399 (Meca Electronics Inc), SM-B-651399 (L3harris Technologies, Inc. Dba Harris Corporation).
Key specifications for SM-B-651399: Overall Height: 3.300 INCHES NOMINAL IN; Usage Design: MAIN LINE AND SECONDARY LINE TERMINAL FITTING; Power Loss in Decibels: 0.25; Design Type: UNIDIRECTIONAL. 5 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 5985-00-155-4200 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.