The Transformer,radio Frequency, cataloged under National Stock Number 5950-00-647-7645, is classified within Federal Supply Class 5950 (Coils and Transformers) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Precision Electronics, Inc. Government technical data includes 14 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government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 | 5950-00-647-7645 |
| Primary Part Number | 1890 |
| Item Name | Transformer,radio Frequency |
| FSC / FSG | 5950 / 59 — Coils and Transformers |
| Manufacturer | Precision Electronics, Inc |
| Status | ACTIVE |
| Transformer Function | INTERSTAGE |
| Inclosure Type | FULLY INCLOSED |
| Body Outside Diameter | 0.572 INCHES NOMINAL IN |
| Mounting Method | THREADED BUSHING SINGLE GROUP |
| Adjustment Device Drive Type | SLOTTED SCREW SINGLE COMPONENT |
| Adjustment Method and Quantity | 1 ADJUSTABLE CORE SINGLE COMPONENT |
| Coil Form Type | HOLLOW SINGLE COMPONENT |
| Winding Function and Quantity | 1 PRIMARY AND 1 SECONDARY SINGLE COMPONENT |
| Nominal Thread Size | 0.250 INCHES SINGLE GROUP IN |
| Body Length | 0.601 INCHES NOMINAL IN |
| Reliability Indicator | NOT ESTABLISHED |
| Frequency Rating | 200.0 KILOHERTZ MAXIMUM SINGLE COMPONENT |
| Terminal Type and Quantity | 4 TURRET |
| 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 |
|---|---|
| 1890 | Precision Electronics, Inc (USA) |
| Reference | Meaning |
|---|---|
| C746104-30 | 5/9 Secondary reference Lockheed Martin Corporation Dba Lockheed Martin Div Lockheed Martin |
| C746104-30 | 3/9 Design control — primary reference Rca Corp Distributor and Special Products Div |
| 910046-512 | 5/9 Secondary reference Lockheed Martin Corporation Dba Lockheed Martin Div Lockheed Martin |
NSN 5950-00-647-7645 is a Transformer,radio Frequency, manufactured by Precision Electronics, Inc, classified under FSC 5950, Coils and Transformers. Status: active.
NSN 5950-00-647-7645 has 1 manufacturer part number on file: 1890 (Precision Electronics, Inc).
5 possible matches (shared part number, not a government interchangeability claim): 6625-00-887-7303, 4820-00-923-4569, 4330-01-012-3313. Verify interchangeability with system specifications before substitution.
Key specifications for 1890: Transformer Function: INTERSTAGE; Inclosure Type: FULLY INCLOSED; Body Outside Diameter: 0.572 INCHES NOMINAL IN; Mounting Method: THREADED BUSHING SINGLE GROUP. 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.