The Circulator,radio Frequency, cataloged under National Stock Number 5985-00-751-8641, 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 11 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-00-751-8641 |
| Primary Part Number | 332392 |
| Item Name | Circulator,radio Frequency |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Frontgrade Technologies Inc. |
| Status | ACTIVE |
| Document Type | MILITARY SPECIFICATION |
| Flange Quantity | 1 AND 2 |
| Connection Method | COVER FLANGE AND CHOKE FLANGE |
| Overall Diameter | 2.500 INCHES NOMINAL IN |
| Flange Type | COVER AND CHOKE |
| Flange Connecting Hole Diameter | 0.144 INCHES MINIMUM AND 0.147 INCHES MAXIMUM IN |
| Identification Designator | TYPE UG-419U,TYPE UG-541U |
| Frequency Range Rating | +12.4 TO 18.0 GIGAHERTZ |
| Flange Connecting Hole Spacing | SPACED ON 0.956 IN. BY 0.994 IN. MTG CTRS IN |
| Document Identification | MIL-F-3922/53 |
| Flange Connection Facility Quantity | 4 |
| 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 |
|---|---|
| 332392 PRIMARY | Frontgrade Technologies Inc. (USA) |
| MA122D | Semic Rf Electronic Gmbh (DEU) |
| Reference | Meaning |
|---|---|
| MA122D | 5/9 Secondary reference U.S. Government activity |
| 332392 | 5/9 Secondary reference Atlantic Microwave Corporation Div Cobham Electronic Systems |
| 332392 | 5/9 Secondary reference U.S. Government activity |
| 10043759 | 7/2 Vendor item drawing reference Us Army Aviation and Missile Command |
NSN 5985-00-751-8641 is a Circulator,radio Frequency, manufactured by Frontgrade Technologies Inc., classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-00-751-8641 has 2 manufacturer part numbers on file: 332392 (Frontgrade Technologies Inc.), MA122D (Semic Rf Electronic Gmbh).
Key specifications for 332392: Document Type: MILITARY SPECIFICATION; Flange Quantity: 1 AND 2; Connection Method: COVER FLANGE AND CHOKE FLANGE; Overall Diameter: 2.500 INCHES NOMINAL IN. 11 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 5985-00-751-8641 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.