The Transformer,audio Frequency, cataloged under National Stock Number 5950-01-043-4457, is classified within Federal Supply Class 5950 (Coils and Transformers) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems. Government technical data includes 14 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5950-01-043-4457 |
| Primary Part Number | 667-0161-020 |
| Item Name | Transformer,audio Frequency |
| FSC / FSG | 5950 / 59 — Coils and Transformers |
| Manufacturer | Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems |
| Status | ACTIVE |
| Inclosure Type | FULLY INCLOSED |
| Body Outside Diameter | 1.060 INCHES NOMINAL IN |
| Mounting Method | THREADED BUSHING SINGLE GROUP |
| Winding Function and Quantity | 1 PRIMARY AND 1 SECONDARY SINGLE COMPONENT |
| Impedance Rating in Ohms | 7500.0 NOMINAL SINGLE COMPONENT SINGLE PRIMARY |
| Impedance Rating in Ohms | 75.0 NOMINAL SINGLE COMPONENT SINGLE SECONDARY |
| Nominal Thread Size | 0.138 INCHES SINGLE GROUP IN |
| Body Length | 0.600 INCHES MAXIMUM IN |
| Reliability Indicator | NOT ESTABLISHED |
| Frequency Rating | 500.0 HERTZ MINIMUM AND 300.0 KILOHERTZ MAXIMUM SINGLE COMPONENT |
| Thread Quantity Per Inch | 32 SINGLE GROUP |
| Primary to Secondary Turn Ratio | 10 TO 1 SINGLE COMPONENT |
| Terminal Type and Quantity | 4 WIRE LEAD |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) SINGLE GROUP |
| 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 |
|---|---|
| 667-0161-020 PRIMARY | Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems (USA) |
| 23750-2 | Torotel, Inc. Div Torotel Products, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 3-18186 | 5/9 Secondary reference Te Connectivity Networks, Inc. Div Adc Telecommunications Sales, Inc. |
| 667-0161-020 | 5/9 Secondary reference Torotel, Inc. Div Torotel Products, Inc. |
| 667-0161-020 | 5/9 Secondary reference Esc Control Electronics Llc Dba Control Electronics Division of Fil-Coil |
NSN 5950-01-043-4457 is a Transformer,audio Frequency, manufactured by Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems, classified under FSC 5950, Coils and Transformers. Status: active.
NSN 5950-01-043-4457 has 2 manufacturer part numbers on file: 667-0161-020 (Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems), 23750-2 (Torotel, Inc. Div Torotel Products, Inc.).
1 possible match (shared part number, not a government interchangeability claim): 5330-01-292-7181. Verify interchangeability with system specifications before substitution.
Key specifications for 667-0161-020: Inclosure Type: FULLY INCLOSED; Body Outside Diameter: 1.060 INCHES NOMINAL IN; Mounting Method: THREADED BUSHING SINGLE GROUP; Winding Function and Quantity: 1 PRIMARY AND 1 SECONDARY SINGLE COMPONENT. 14 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.