The Filter,radio Frequency Interfere, cataloged under National Stock Number 5915-01-221-6478, is classified within Federal Supply Class 5915 (Filters and Networks) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Spectrum Control, Inc.. Government technical data includes 4 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5915-01-221-6478 |
| Primary Part Number | 51-321-611 |
| Item Name | Filter,radio Frequency Interfere |
| FSC / FSG | 5915 / 59 — Filters and Networks |
| Manufacturer | Spectrum Control, Inc. |
| Status | ACTIVE |
| Inside Width | 0.250 INCHES NOMINAL IN |
| Body Outside Diameter | 0.672 INCHES MINIMUM AND 0.702 INCHES MAXIMUM IN |
| Source Impedance Rating Per Function | 0.080 OHMS BLANK FIRST FUNCTION |
| Operating Current Rating Per Function in Amps | 2.0 BLANK FIRST FUNCTION |
| 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 |
|---|---|
| 51-321-611 PRIMARY | Spectrum Control, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 51-321-611 | 5/9 Secondary reference Spectrum Control Inc |
NSN 5915-01-221-6478 is a Filter,radio Frequency Interfere, manufactured by Spectrum Control, Inc., classified under FSC 5915, Filters and Networks. Status: active.
NSN 5915-01-221-6478 has 1 manufacturer part number on file: 51-321-611 (Spectrum Control, Inc.).
Key specifications for 51-321-611: Inside Width: 0.250 INCHES NOMINAL IN; Body Outside Diameter: 0.672 INCHES MINIMUM AND 0.702 INCHES MAXIMUM IN; Source Impedance Rating Per Function: 0.080 OHMS BLANK FIRST FUNCTION; Operating Current Rating Per Function in Amps: 2.0 BLANK FIRST FUNCTION. 4 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.