The Reactor, cataloged under National Stock Number 5950-00-137-9399, 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 25 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 5950-00-137-9399 |
| Primary Part Number | M972 |
| Item Name | Reactor |
| FSC / FSG | 5950 / 59 — Coils and Transformers |
| Manufacturer | Magnespec Inc |
| Status | ACTIVE |
| Mounting Facility Quantity | 4 SINGLE GROUP |
| Inclosure Type | FULLY INCLOSED |
| Center to Center Distance Between Mounting Facilities Parallel to Length | 1.750 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN |
| Mounting Method | THREADED STUD(S) SINGLE GROUP |
| Inductance Rating | 350.00 MILLIHENRIES NOMINAL SINGLE COMPONENT THIRD WINDING |
| Inductance Rating | 55.00 MILLIHENRIES NOMINAL SINGLE COMPONENT FIRST WINDING |
| Inductance Rating | 55.00 MILLIHENRIES NOMINAL SINGLE COMPONENT SECOND WINDING |
| Body Width | 2.062 INCHES NOMINAL IN |
| Body Height | 2.875 INCHES NOMINAL IN |
| Nominal Thread Size | 0.138 INCHES SINGLE GROUP IN |
| Body Length | 2.310 INCHES NOMINAL IN |
| Winding Operating Current | 175.0 MILLIAMPERES DC MAXIMUM SINGLE COMPONENT THIRD WINDING |
| Winding Operating Current | 390.0 MILLIAMPERES DC MAXIMUM SINGLE COMPONENT SECOND WINDING |
| Winding Operating Current | 675.0 MILLIAMPERES DC MAXIMUM SINGLE COMPONENT FIRST WINDING |
| Rating Method | ELECTRICAL SINGLE COMPONENT ALL WINDING |
| DC Resistance Rating in Ohms | 1.500 SINGLE COMPONENT FIRST WINDING |
| DC Resistance Rating in Ohms | 1.500 SINGLE COMPONENT SECOND WINDING |
| DC Resistance Rating in Ohms | 15.000 SINGLE COMPONENT THIRD WINDING |
| Reliability Indicator | NOT ESTABLISHED |
| Winding Quantity | 3 SINGLE COMPONENT |
| Center to Center Distance Between Mounting Facilities Parallel to Width | 1.375 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN |
| Thread Quantity Per Inch | 32 SINGLE GROUP |
| Terminal Type and Quantity | 6 SOLDER STUD |
| 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 |
|---|---|
| M972 | Magnespec Inc (USA) |
| Reference | Meaning |
|---|---|
| SMB525464 | 3/2 Design control — primary reference U.S. Government activity |
| M972 | 5/9 Secondary reference U.S. Government activity |
NSN 5950-00-137-9399 is a Reactor, manufactured by Magnespec Inc, classified under FSC 5950, Coils and Transformers. Status: active.
NSN 5950-00-137-9399 has 1 manufacturer part number on file: M972 (Magnespec Inc).
3 possible matches (shared part number, not a government interchangeability claim): 5330-00-509-9504, 5855-01-513-8366, 8415-01-620-1402. Verify interchangeability with system specifications before substitution.
Key specifications for M972: Mounting Facility Quantity: 4 SINGLE GROUP; Inclosure Type: FULLY INCLOSED; Center to Center Distance Between Mounting Facilities Parallel to Length: 1.750 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN; Mounting Method: THREADED STUD(S) SINGLE GROUP. 25 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.