The Coupler,transmission Line, cataloged under National Stock Number 5985-01-238-4971, 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 Naval Sea Systems Command. Government technical data includes 6 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5985-01-238-4971 |
| Primary Part Number | 5757858 |
| Item Name | Coupler,transmission Line |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Input Impedance Rating in Ohms | 50.0 |
| Radio Frequency Rating | 10.0 MEGAHERTZ MINIMUM AND 100.0 MEGAHERTZ MAXIMUM |
| Unit Type | TRANSMISSION LINE |
| Mounting Configuration | TWO 0.140 IN. DIA MTG HOLES LOCATED 1.060 IN. C TO C ACROSS THE LENGTH IN |
| Material | NICKEL ALLOY OR STEEL |
| Output Impedance Rating in Ohms | 50.0 |
| 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 |
|---|---|
| PDM-20-55/52011 | Merrimac Industries, Inc (USA) |
| 1206223 | Lockheed Martin Corporation Div Rms - Mitchel Field (USA) |
| 5757858 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 2180 | 5/9 Secondary reference Merrimac Industries, Inc |
| PDM-20-55/12614 | 5/9 Secondary reference Merrimac Industries, Inc |
NSN 5985-01-238-4971 is a Coupler,transmission Line, manufactured by Naval Sea Systems Command, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-01-238-4971 has 3 manufacturer part numbers on file: PDM-20-55/52011 (Merrimac Industries, Inc), 1206223 (Lockheed Martin Corporation Div Rms - Mitchel Field), 5757858 (Naval Sea Systems Command).
Key specifications for 5757858: Overall Height: 1.210 INCHES MAXIMUM IN; Input Impedance Rating in Ohms: 50.0; Radio Frequency Rating: 10.0 MEGAHERTZ MINIMUM AND 100.0 MEGAHERTZ MAXIMUM; Overall Length: 1.640 INCHES MAXIMUM IN. 6 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.