The Coil,radio Frequency, cataloged under National Stock Number 5950-01-075-9551, is classified within Federal Supply Class 5950 (Coils and Transformers) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Piconics, Inc. Dba Piconics Inc. Government technical data includes 16 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5950-01-075-9551 |
| Primary Part Number | ST221K8I |
| Item Name | Coil,radio Frequency |
| FSC / FSG | 5950 / 59 — Coils and Transformers |
| Manufacturer | Piconics, Inc. Dba Piconics Inc |
| Status | ACTIVE |
| Inclosure Type | FULLY INCLOSED |
| Quality Factor | 30 MINIMUM SINGLE COMPONENT SINGLE WINDING |
| Overall Diameter | 0.312 INCHES NOMINAL IN |
| Mounting Method | TERMINAL SINGLE GROUP |
| Inductance Rating | 0.16 MICROHENRIES MINIMUM AND 0.22 MICROHENRIES MAXIMUM SINGLE COMPONENT SINGLE WINDING |
| Adjustment Device Drive Type | SLOTTED SCREW SINGLE COMPONENT |
| Body Width | 0.093 INCHES NOMINAL IN |
| Adjustment Method and Quantity | 1 ADJUSTABLE CORE SINGLE COMPONENT |
| Coil Form Type | HOLLOW SINGLE COMPONENT |
| Body Length | 0.187 INCHES NOMINAL IN |
| Winding Operating Current | 180.0 MILLIAMPERES DC MAXIMUM SINGLE COMPONENT SINGLE WINDING |
| Rating Method | ELECTRICAL SINGLE COMPONENT SINGLE WINDING |
| DC Resistance Rating in Ohms | 0.400 SINGLE COMPONENT SINGLE WINDING |
| Reliability Indicator | NOT ESTABLISHED |
| Core Construction | POWDERED SINGLE COMPONENT |
| 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 |
|---|---|
| ST221K8I PRIMARY | Piconics, Inc. Dba Piconics Inc (USA) |
| 24709-3220-0010 | Thales Uk Limited Dba Thales Uk Ltd Defence Mission Systems (GBR) |
| 41060-0000-0472 | Thales Uk Limited Dba Thales Uk Ltd Defence Mission Systems (GBR) |
| Reference | Meaning |
|---|---|
| 172782-7 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
NSN 5950-01-075-9551 is a Coil,radio Frequency, manufactured by Piconics, Inc. Dba Piconics Inc, classified under FSC 5950, Coils and Transformers. Status: active.
NSN 5950-01-075-9551 has 3 manufacturer part numbers on file: ST221K8I (Piconics, Inc. Dba Piconics Inc), 24709-3220-0010 (Thales Uk Limited Dba Thales Uk Ltd Defence Mission Systems), 41060-0000-0472 (Thales Uk Limited Dba Thales Uk Ltd Defence Mission Systems).
Key specifications for ST221K8I: Inclosure Type: FULLY INCLOSED; Quality Factor: 30 MINIMUM SINGLE COMPONENT SINGLE WINDING; Overall Diameter: 0.312 INCHES NOMINAL IN; Mounting Method: TERMINAL SINGLE GROUP. 16 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.