The Coupler,directional, cataloged under National Stock Number 5985-00-581-5275, 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 Microwave Devices Inc. Government technical data includes 9 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-00-581-5275 |
| Primary Part Number | 573-54 |
| Item Name | Coupler,directional |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Microwave Devices Inc |
| Status | ACTIVE |
| Terminal Fitting Controlling Agency | RETMA; RETMA |
| Usage Design | MAIN LINE AND SECONDARY LINE TERMINAL FITTING |
| Power Loss in Decibels | 40.0 |
| Identifying Number | TERMINAL FITTING RG-154-U; UG-573-U |
| Design Type | BIDIRECTIONAL |
| Overall Diameter | 5.188 INCHES NOMINAL IN |
| Radio Frequency Rating | 0.02 GIGAHERTZ MINIMUM AND 2.0 GIGAHERTZ MAXIMUM |
| Unit Type | TRANSMISSION LINE |
| Usage Design | USED AS DIRECTIONAL COUPLER FOR FR AMPLIFIER |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
NSN 5985-00-581-5275 is a Coupler,directional, manufactured by Microwave Devices Inc, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-00-581-5275 has 2 manufacturer part numbers on file: 334C947 (Westinghouse Electric Corp), 573-54 (Microwave Devices Inc).
1 possible match (shared part number, not a government interchangeability claim): 5305-01-122-6508. Verify interchangeability with system specifications before substitution.
Key specifications for 573-54: Terminal Fitting Controlling Agency: RETMA; RETMA; Usage Design: MAIN LINE AND SECONDARY LINE TERMINAL FITTING; Power Loss in Decibels: 40.0; Identifying Number: TERMINAL FITTING RG-154-U; UG-573-U. 9 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 5985-00-581-5275 has DEMIL Code D. 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.