The Coil,radio Frequency, cataloged under National Stock Number 5950-00-645-3750, is classified within Federal Supply Class 5950 (Coils and Transformers) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Smart Machines, Inc. Dba Barker and Williamson. Government technical data includes 11 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5950-00-645-3750 |
| Primary Part Number | D170647 |
| Item Name | Coil,radio Frequency |
| FSC / FSG | 5950 / 59 — Coils and Transformers |
| Manufacturer | Smart Machines, Inc. Dba Barker and Williamson |
| Status | ACTIVE |
| Inclosure Type | FULLY INCLOSED |
| Overall Diameter | 0.438 INCHES NOMINAL IN |
| Turn Quantity | 920 SINGLE COMPONENT SINGLE WINDING |
| Mounting Method | TERMINAL SINGLE GROUP |
| Inductance Rating | 2.50 MILLIHENRIES NOMINAL SINGLE COMPONENT SINGLE WINDING |
| Winding Conductor Size | 0.00397 INCHES AMERICAN WIRE GAGE SINGLE COMPONENT SINGLE WINDING IN |
| Coil Form Type | HOLLOW SINGLE COMPONENT |
| Body Length | 0.875 INCHES NOMINAL IN |
| DC Resistance Rating in Ohms | 90.000 SINGLE COMPONENT SINGLE WINDING |
| Reliability Indicator | NOT ESTABLISHED |
| Terminal Type and Quantity | 2 WIRE LEAD |
| 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 |
|---|---|
| D170647 PRIMARY | Smart Machines, Inc. Dba Barker and Williamson (USA) |
| 53B221 PRIMARY | Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Multiple (USA) |
| D170647 PRIMARY | Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Multiple (USA) |
| Reference | Meaning |
|---|---|
| 53B221 | 5/9 Secondary reference U.S. Government activity |
| D170647 | 5/9 Secondary reference Barker & Williamson |
| 124-34C | 5/9 Secondary reference Barker & Williamson |
| 124-34C | C/1 Advisory reference — outside the item-of-supply concept Smart Machines, Inc. Dba Barker and Williamson |
| D170647 | 5/9 Secondary reference American Telephone and Telegraph Co |
| D170647 | 5/9 Secondary reference U.S. Government activity |
NSN 5950-00-645-3750 is a Coil,radio Frequency, manufactured by Smart Machines, Inc. Dba Barker and Williamson, classified under FSC 5950, Coils and Transformers. Status: active.
NSN 5950-00-645-3750 has 3 manufacturer part numbers on file: D170647 (Smart Machines, Inc. Dba Barker and Williamson), 53B221 (Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Multiple), D170647 (Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Multiple).
Key specifications for D170647: Inclosure Type: FULLY INCLOSED; Overall Diameter: 0.438 INCHES NOMINAL IN; Turn Quantity: 920 SINGLE COMPONENT SINGLE WINDING; Mounting Method: TERMINAL SINGLE GROUP. 11 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.