The Coil,radio Frequency, cataloged under National Stock Number 5950-00-189-9857, is classified within Federal Supply Class 5950 (Coils and Transformers) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Multiple. Government technical data includes 14 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5950-00-189-9857 |
| Primary Part Number | 51A504 |
| Item Name | Coil,radio Frequency |
| FSC / FSG | 5950 / 59 — Coils and Transformers |
| Manufacturer | Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Multiple |
| Status | ACTIVE |
| Mounting Facility Quantity | 2 SINGLE GROUP |
| Inclosure Type | OPEN |
| Quality Factor | 300 MINIMUM SINGLE COMPONENT SINGLE WINDING |
| Body Outside Diameter | 0.750 INCHES NOMINAL IN |
| Turn Quantity | 9 SINGLE COMPONENT SINGLE WINDING |
| Mounting Method | UNTHREADED HOLE(S) SINGLE GROUP |
| Winding Conductor Size | 0.06408 INCHES AMERICAN WIRE GAGE SINGLE COMPONENT SINGLE WINDING IN |
| Mounting Hole Diameter | 0.125 INCHES NOMINAL SINGLE GROUP IN |
| Coil Form Type | SOLID SINGLE COMPONENT |
| Distance Between Mounting Facility Centers | 1.312 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN |
| Body Length | 1.625 INCHES NOMINAL IN |
| Rating Method | ELECTRICAL AND WINDING TURNS SINGLE COMPONENT SINGLE WINDING |
| Reliability Indicator | NOT ESTABLISHED |
| Terminal Type and Quantity | 2 TAB, SOLDER LUG |
| 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 |
|---|---|
| 51A504 | Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Multiple (USA) |
| 51B504 | Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Multiple (USA) |
| Reference | Meaning |
|---|---|
| 51B504 | 5/9 Secondary reference U.S. Government activity |
| 5011 | 3/9 Design control — primary reference U.S. Government activity |
NSN 5950-00-189-9857 is a Coil,radio Frequency, manufactured by Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Multiple, classified under FSC 5950, Coils and Transformers. Status: active.
NSN 5950-00-189-9857 has 2 manufacturer part numbers on file: 51A504 (Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Multiple), 51B504 (Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Multiple).
1 possible match (shared part number, not a government interchangeability claim): 5995-00-445-9941. Verify interchangeability with system specifications before substitution.
Key specifications for 51A504: Mounting Facility Quantity: 2 SINGLE GROUP; Inclosure Type: OPEN; Quality Factor: 300 MINIMUM SINGLE COMPONENT SINGLE WINDING; Body Outside Diameter: 0.750 INCHES NOMINAL IN. 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.