The Circulator,radio Frequency, cataloged under National Stock Number 5985-01-244-9276, 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 Frontgrade Technologies Inc.. Government technical data includes 4 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-01-244-9276 |
| Primary Part Number | 58090-558 |
| Item Name | Circulator,radio Frequency |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Frontgrade Technologies Inc. |
| Status | ACTIVE |
| Connection Method | WAVEGUIDE FLANGE |
| Impedance Rating in Ohms | 50.0 NOMINAL |
| Frequency Range Rating | +5.0 TO 10.0 GIGAHERTZ |
| Insertion Loss in Decibels | 0.4 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 58090-558 PRIMARY | Frontgrade Technologies Inc. (USA) |
| 3683430-2 PRIMARY | Raytheon Company Dba Raytheon Co (USA) |
| Reference | Meaning |
|---|---|
| H970073-002B | 5/1 Secondary reference Microwave Development Company Inc Dba Microwave Development Company Inc |
| 58090-558 | 5/9 Secondary reference Microwave Development Company Inc Dba Microwave Development Company Inc |
| H970073-002B | 7/2 Vendor item drawing reference U.S. Government activity |
NSN 5985-01-244-9276 is a Circulator,radio Frequency, manufactured by Frontgrade Technologies Inc., classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-01-244-9276 has 2 manufacturer part numbers on file: 58090-558 (Frontgrade Technologies Inc.), 3683430-2 (Raytheon Company Dba Raytheon Co).
Key specifications for 58090-558: Overall Height: 1.625 INCHES NOMINAL IN; Connection Method: WAVEGUIDE FLANGE; Overall Length: 3.532 INCHES NOMINAL IN; Overall Width: 2.438 INCHES NOMINAL IN. 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.
NSN 5985-01-244-9276 has DEMIL Code Q. 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.