The Circulator,radio Frequency, cataloged under National Stock Number 5985-01-021-5599, 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 Aimtron Systems, Llc. Government technical data includes 2 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-01-021-5599 |
| Primary Part Number | 402138 |
| Item Name | Circulator,radio Frequency |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Aimtron Systems, Llc |
| Status | ACTIVE |
| FSC Application Data | RADAR ANTENNA SUPPORT SETS AND RADOMES,EXCEPT SPECIALLY DESIGNED |
| Connection Method | WAVEGUIDE FLANGE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 402138 PRIMARY | Aimtron Systems, Llc (USA) |
| 402138 | Frontgrade Technologies Inc. (USA) |
| Reference | Meaning |
|---|---|
| 402138 | 5/9 Secondary reference Cardion Inc |
| 5985PL0981880 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| 402138 | 5/9 Secondary reference U.S. Government activity |
NSN 5985-01-021-5599 is a Circulator,radio Frequency, manufactured by Aimtron Systems, Llc, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-01-021-5599 has 2 manufacturer part numbers on file: 402138 (Aimtron Systems, Llc), 402138 (Frontgrade Technologies Inc.).
2 possible matches (shared part number, not a government interchangeability claim): 5930-01-538-4739, 1010-01-654-7340. Verify interchangeability with system specifications before substitution.
Key specifications for 402138: FSC Application Data: RADAR ANTENNA SUPPORT SETS AND RADOMES,EXCEPT SPECIALLY DESIGNED; Connection Method: WAVEGUIDE FLANGE. 2 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 5985-01-021-5599 has DEMIL Code D. 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.