The Coupler,directional, cataloged under National Stock Number 5985-00-436-2003, 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 Support Services Corp. Government technical data includes 8 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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 | 5985-00-436-2003 |
| Primary Part Number | 128C498H03 |
| Item Name | Coupler,directional |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Northrop Grumman Support Services Corp |
| Status | ACTIVE |
| FSC Application Data | ANTENNAS,WAVEGUIDES,AND RELATED EQUIPMENT |
| Terminal Fitting Controlling Agency | MIL |
| Unpackaged Unit Weight | 1.900 OUNCES NOMINAL OZ |
| Usage Design | MAIN LINE AND SECONDARY LINE TERMINAL FITTING |
| Power Loss in Decibels | 6.0 |
| Design Type | BIDIRECTIONAL |
| Radio Frequency Rating | 1.0 GIGAHERTZ MINIMUM AND 2.0 GIGAHERTZ MAXIMUM |
| Unit Type | TRANSMISSION 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 |
|---|---|
| 128C498H03 | Northrop Grumman Support Services Corp (USA) |
| Reference | Meaning |
|---|---|
| 20063-6-9292 | 5/9 Secondary reference U.S. Government activity |
| 2023-6121-06 | 3/9 Design control — primary reference U.S. Government activity |
| 20063-6 | 5/9 Secondary reference U.S. Government activity |
| 128C498H03 | 5/9 Secondary reference U.S. Government activity |
NSN 5985-00-436-2003 is a Coupler,directional, manufactured by Northrop Grumman Support Services Corp, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-00-436-2003 has 1 manufacturer part number on file: 128C498H03 (Northrop Grumman Support Services Corp).
4 possible matches (shared part number, not a government interchangeability claim): 5315-00-517-5209, 5945-01-101-7675, 5305-01-376-9538. Verify interchangeability with system specifications before substitution.
Key specifications for 128C498H03: Overall Height: 0.380 INCHES NOMINAL IN; FSC Application Data: ANTENNAS,WAVEGUIDES,AND RELATED EQUIPMENT; Terminal Fitting Controlling Agency: MIL; Unpackaged Unit Weight: 1.900 OUNCES NOMINAL OZ. 8 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 5985-00-436-2003 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.