The Coupler,directional, cataloged under National Stock Number 5985-00-992-4511, 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 Development Laboratories, Inc. Dba Microwave Development Laboratories Inc. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-00-992-4511 |
| Primary Part Number | 90CT239-1A |
| Item Name | Coupler,directional |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Microwave Development Laboratories, Inc. Dba Microwave Development Laboratories Inc |
| Status | ACTIVE |
| Terminal Fitting Controlling Agency | MIL |
| Usage Design | MAIN LINE TERMINAL FITTING |
| Power Loss in Decibels | 10.0 |
| Identifying Number | TERMINAL FITTING TYPE NO. UG135/U |
| Design Type | UNIDIRECTIONAL |
| Radio Frequency Rating | 8.0 GIGAHERTZ MINIMUM AND 10.0 GIGAHERTZ MAXIMUM |
| Unit Type | WAVEGUIDE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 9995237 | Us Army Aviation and Missile Command (USA) |
| 90CT239-1A PRIMARY | Microwave Development Laboratories, Inc. Dba Microwave Development Laboratories Inc (USA) |
NSN 5985-00-992-4511 is a Coupler,directional, manufactured by Microwave Development Laboratories, Inc. Dba Microwave Development Laboratories Inc, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-00-992-4511 has 2 manufacturer part numbers on file: 9995237 (Us Army Aviation and Missile Command), 90CT239-1A (Microwave Development Laboratories, Inc. Dba Microwave Development Laboratories Inc).
Key specifications for 90CT239-1A: Overall Height: 2.342 INCHES NOMINAL IN; Terminal Fitting Controlling Agency: MIL; Usage Design: MAIN LINE TERMINAL FITTING; Power Loss in Decibels: 10.0. 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.
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.