The Transformer,audio Frequency, cataloged under National Stock Number 5950-01-326-2277, is classified within Federal Supply Class 5950 (Coils and Transformers) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Torotel, Inc. Div Torotel Products, Inc.. Government technical data includes 12 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 5950-01-326-2277 |
| Primary Part Number | 28891 |
| Item Name | Transformer,audio Frequency |
| FSC / FSG | 5950 / 59 — Coils and Transformers |
| Manufacturer | Torotel, Inc. Div Torotel Products, Inc. |
| Status | ACTIVE |
| Mounting Facility Quantity | 1 SINGLE GROUP |
| Inclosure Type | FULLY INCLOSED |
| Body Outside Diameter | 1.600 INCHES MINIMUM AND 1.640 INCHES MAXIMUM IN |
| Mounting Method | THREADED STUD(S) SINGLE GROUP |
| Winding Function and Quantity | 1 PRIMARY AND 1 SECONDARY SINGLE COMPONENT |
| Features Provided | COLOR CODED TERMINAL |
| Nominal Thread Size | 0.112 INCHES SINGLE GROUP IN |
| Body Length | 1.120 INCHES MAXIMUM IN |
| Reliability Indicator | NOT ESTABLISHED |
| Frequency Rating | 15.0 KILOHERTZ NOMINAL SINGLE COMPONENT |
| Terminal Type and Quantity | 9 PIN |
| 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 |
|---|---|
| 28891 | Torotel, Inc. Div Torotel Products, Inc. (USA) |
| Reference | Meaning |
|---|---|
| SM-A-939639 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5950-01-326-2277 is a Transformer,audio Frequency, manufactured by Torotel, Inc. Div Torotel Products, Inc., classified under FSC 5950, Coils and Transformers. Status: active.
NSN 5950-01-326-2277 has 1 manufacturer part number on file: 28891 (Torotel, Inc. Div Torotel Products, Inc.).
2 possible matches (shared part number, not a government interchangeability claim): 5305-01-564-4254, 6105-01-686-0821. Verify interchangeability with system specifications before substitution.
Key specifications for 28891: Mounting Facility Quantity: 1 SINGLE GROUP; Inclosure Type: FULLY INCLOSED; Body Outside Diameter: 1.600 INCHES MINIMUM AND 1.640 INCHES MAXIMUM IN; Mounting Method: THREADED STUD(S) SINGLE GROUP. 12 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.