The Transformer,audio Frequency, cataloged under National Stock Number 5950-00-429-9985, is classified within Federal Supply Class 5950 (Coils and Transformers) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Instruments and Flight Research, Inc.. Government technical data includes 13 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 5950-00-429-9985 |
| Primary Part Number | 529260C90055 |
| Item Name | Transformer,audio Frequency |
| FSC / FSG | 5950 / 59 — Coils and Transformers |
| Manufacturer | Instruments and Flight Research, Inc. |
| Status | ACTIVE |
| Inclosure Type | FULLY INCLOSED |
| Body Outside Diameter | 0.500 INCHES NOMINAL IN |
| Mounting Method | TERMINAL SINGLE GROUP |
| Maximum Transformer Power Rating | 500.0 MILLIWATTS SINGLE COMPONENT |
| Winding Function and Quantity | 1 PRIMARY AND 2 SECONDARY SINGLE COMPONENT |
| Impedance Rating in Ohms | 400.0 NOMINAL SINGLE COMPONENT SINGLE PRIMARY |
| Impedance Rating in Ohms | 10.0 NOMINAL SINGLE COMPONENT FIRST SECONDARY |
| Impedance Rating in Ohms | 10.0 NOMINAL SINGLE COMPONENT SECOND SECONDARY |
| Body Length | 0.500 INCHES NOMINAL IN |
| Winding Operating Current | 8.0 MILLIAMPERES DC MAXIMUM SINGLE COMPONENT SINGLE PRIMARY |
| Reliability Indicator | NOT ESTABLISHED |
| Frequency Rating | 1.0 KILOHERTZ NOMINAL SINGLE COMPONENT |
| Terminal Type and Quantity | 7 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 |
|---|---|
| 999-0128-454 | Varo Llc (USA) |
| 529260C90055 PRIMARY | Instruments and Flight Research, Inc. (USA) |
| Reference | Meaning |
|---|---|
| TT054 | 5/9 Secondary reference Varo Llc |
| DHH1025 | 5/1 Secondary reference Dla Land and Maritime Dba Engineering and Technical Support Div Document Standardization Division (vendor Item Drawings) |
NSN 5950-00-429-9985 is a Transformer,audio Frequency, manufactured by Instruments and Flight Research, Inc., classified under FSC 5950, Coils and Transformers. Status: active.
NSN 5950-00-429-9985 has 2 manufacturer part numbers on file: 999-0128-454 (Varo Llc), 529260C90055 (Instruments and Flight Research, Inc.).
3 possible matches (shared part number, not a government interchangeability claim): 5950-00-431-5289, 5950-00-432-0514, 5950-00-432-0516. Verify interchangeability with system specifications before substitution.
Key specifications for 529260C90055: Inclosure Type: FULLY INCLOSED; Body Outside Diameter: 0.500 INCHES NOMINAL IN; Mounting Method: TERMINAL SINGLE GROUP; Maximum Transformer Power Rating: 500.0 MILLIWATTS SINGLE COMPONENT. 13 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.