The Transformer,audio Frequency, cataloged under National Stock Number 5950-00-811-8669, is classified within Federal Supply Class 5950 (Coils and Transformers) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Magnespec Inc. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5950-00-811-8669 |
| Primary Part Number | AU-4173 |
| Item Name | Transformer,audio Frequency |
| FSC / FSG | 5950 / 59 — Coils and Transformers |
| Manufacturer | Magnespec Inc |
| Status | ACTIVE |
| Mounting Facility Quantity | 2 SINGLE GROUP |
| Inclosure Type | OPEN |
| Mounting Method | FLANGE AND UNTHREADED HOLE(S) SINGLE GROUP |
| Body Width | 0.812 INCHES NOMINAL IN |
| Body Height | 0.750 INCHES NOMINAL IN |
| Mounting Hole Diameter | 0.125 INCHES NOMINAL SINGLE GROUP IN |
| Winding Function and Quantity | 1 PRIMARY AND 1 SECONDARY SINGLE COMPONENT |
| Impedance Rating in Ohms | 4000.0 NOMINAL SINGLE COMPONENT SINGLE PRIMARY |
| Impedance Rating in Ohms | 3200.0 NOMINAL SINGLE COMPONENT SINGLE SECONDARY |
| Distance Between Mounting Facility Centers | 1.062 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN |
| Body Length | 1.000 INCHES NOMINAL IN |
| Winding Operating Current | 5.0 MILLIAMPERES DC MAXIMUM SINGLE COMPONENT SINGLE PRIMARY |
| Reliability Indicator | NOT ESTABLISHED |
| Frequency Rating | 400.0 HERTZ MAXIMUM SINGLE COMPONENT |
| Terminal Type and Quantity | 5 WIRE LEAD |
| 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 |
|---|---|
| AU-4173 | Magnespec Inc (USA) |
| Reference | Meaning |
|---|---|
| TD283 | 5/9 Secondary reference Northlake Engineering, Inc. |
| 135-006-0027 | 5/9 Secondary reference U.S. Government activity |
| AU-4173 | 5/9 Secondary reference U.S. Government activity |
| 135-006-0027 | 3/9 Design control — primary reference Moog Inc. Dba Moog Components Group |
NSN 5950-00-811-8669 is a Transformer,audio Frequency, manufactured by Magnespec Inc, classified under FSC 5950, Coils and Transformers. Status: active.
NSN 5950-00-811-8669 has 1 manufacturer part number on file: AU-4173 (Magnespec Inc).
Key specifications for AU-4173: Mounting Facility Quantity: 2 SINGLE GROUP; Inclosure Type: OPEN; Mounting Method: FLANGE AND UNTHREADED HOLE(S) SINGLE GROUP; Body Width: 0.812 INCHES NOMINAL IN. 15 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.