The Isolator,radio Frequency Reflect, cataloged under National Stock Number 5985-01-109-8317, 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 Frequency Electronics Inc. Government technical data includes 5 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-01-109-8317 |
| Primary Part Number | A4H2040 |
| Item Name | Isolator,radio Frequency Reflect |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Frequency Electronics Inc |
| Status | ACTIVE |
| Controlling Agency | GENERAL DYNAMICS CORP |
| Trade Designation | CONNECTOR,ELECTRICAL |
| Identifying Number | SMA TYPE NO. |
| Connector Quantity | 4 |
| Frequency Range Rating | +2.0 TO 4.0 GIGAHERTZ |
| 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 |
|---|---|
| A4H2040 | Frequency Electronics Inc (USA) |
| M4I2040 | Dal-Tech Devices, Inc. Dba Dal-Tech Devices Inc Div Dal-Tec Devices, Inc (USA) |
| Reference | Meaning |
|---|---|
| A4H2040 | 5/9 Secondary reference Fei Microwave Inc |
| 654VE4842-2 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5985-01-109-8317 is a Isolator,radio Frequency Reflect, manufactured by Frequency Electronics Inc, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-01-109-8317 has 2 manufacturer part numbers on file: A4H2040 (Frequency Electronics Inc), M4I2040 (Dal-Tech Devices, Inc. Dba Dal-Tech Devices Inc Div Dal-Tec Devices, Inc).
Key specifications for A4H2040: Overall Height: 0.750 INCHES NOMINAL IN; Controlling Agency: GENERAL DYNAMICS CORP; Trade Designation: CONNECTOR,ELECTRICAL; Identifying Number: SMA TYPE NO.. 5 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 5985-01-109-8317 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.