The Reactor, cataloged under National Stock Number 5950-00-558-0666, is classified within Federal Supply Class 5950 (Coils and Transformers) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Freed Transformer Co. Government technical data includes 12 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 5950-00-558-0666 |
| Primary Part Number | 41677 |
| Item Name | Reactor |
| FSC / FSG | 5950 / 59 — Coils and Transformers |
| Manufacturer | Freed Transformer Co |
| Status | ACTIVE |
| Inclosure Type | HERMETICALLY SEALED |
| Overall Diameter | 2.190 INCHES NOMINAL IN |
| Body Outside Diameter | 2.000 INCHES NOMINAL IN |
| Inductance Rating | 144.00 MICROHENRIES NOMINAL SINGLE COMPONENT SINGLE WINDING |
| Nominal Thread Size | 0.164 INCHES SINGLE GROUP IN |
| Body Length | 1.500 INCHES MAXIMUM IN |
| Winding Operating Current | 2.0 AMPERES DC MAXIMUM SINGLE COMPONENT SINGLE WINDING |
| Winding Quantity | 1 SINGLE COMPONENT |
| Thread Quantity Per Inch | 32 SINGLE GROUP |
| Terminal Type and Quantity | 2 TURRET |
| Inductance Type | FIXED |
| 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 |
|---|---|
| A51S29125-3 | Northrop Grumman Systems Corporation (USA) |
| 41677 PRIMARY | Freed Transformer Co (USA) |
| Reference | Meaning |
|---|---|
| A51S29125-3 | 5/9 Secondary reference Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Northrop Grumman Aeronautics Systems |
| A51S29125-3 | 5/9 Secondary reference Northrop Grumman Systems Corporation |
NSN 5950-00-558-0666 is a Reactor, manufactured by Freed Transformer Co, classified under FSC 5950, Coils and Transformers. Status: active.
NSN 5950-00-558-0666 has 2 manufacturer part numbers on file: A51S29125-3 (Northrop Grumman Systems Corporation), 41677 (Freed Transformer Co).
3 possible matches (shared part number, not a government interchangeability claim): 5950-00-731-5823, 2840-01-120-6309, 2520-01-152-0941. Verify interchangeability with system specifications before substitution.
Key specifications for 41677: Inclosure Type: HERMETICALLY SEALED; Overall Diameter: 2.190 INCHES NOMINAL IN; Body Outside Diameter: 2.000 INCHES NOMINAL IN; Inductance Rating: 144.00 MICROHENRIES NOMINAL SINGLE COMPONENT SINGLE WINDING. 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.