The Coupler,directional, cataloged under National Stock Number 5985-01-413-0879, 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 Emhiser Tele-Tech Inc. Government technical data includes 4 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-01-413-0879 |
| Primary Part Number | CT-91 |
| Item Name | Coupler,directional |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Emhiser Tele-Tech Inc |
| Status | ACTIVE |
| Design Type | UNIDIRECTIONAL |
| Overall Diameter | 0.580 INCHES MINIMUM AND 0.620 INCHES MAXIMUM IN |
| Radio Frequency Rating | 250.0 MEGAHERTZ NOMINAL |
| Unit Type | TRANSMISSION LINE |
| 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 |
|---|---|
| CT-91 | Emhiser Tele-Tech Inc (USA) |
| Reference | Meaning |
|---|---|
| CH-700 | 3/9 Design control — primary reference M/a-Com Inc |
| 1651987-1 | 7/2 Vendor item drawing reference U.S. Government activity |
NSN 5985-01-413-0879 is a Coupler,directional, manufactured by Emhiser Tele-Tech Inc, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-01-413-0879 has 1 manufacturer part number on file: CT-91 (Emhiser Tele-Tech Inc).
Key specifications for CT-91: Overall Height: 0.316 INCHES MINIMUM AND 0.320 INCHES MAXIMUM IN; Design Type: UNIDIRECTIONAL; Overall Diameter: 0.580 INCHES MINIMUM AND 0.620 INCHES MAXIMUM IN; Radio Frequency Rating: 250.0 MEGAHERTZ NOMINAL. 4 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.