The Filter,radio Frequency Interfere, cataloged under National Stock Number 5915-01-173-2904, is classified within Federal Supply Class 5915 (Filters and Networks) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Ems Development Corporation. Government technical data includes 28 specifications, cited from the U.S. Government catalog. The record lists 4 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5915-01-173-2904 |
| Primary Part Number | 258S003-440 |
| Item Name | Filter,radio Frequency Interfere |
| FSC / FSG | 5915 / 59 — Filters and Networks |
| Manufacturer | Ems Development Corporation |
| Status | ACTIVE |
| Mounting Facility Type and Quantity | 6 UNTHREADED HOLE(S) LOCATION NOT OTHERWISE SPECIFIED |
| Inclosure Type | ENCASED |
| Distance Between Centerlines of Mounting Facilities Parallel to Body Length | 3.490 INCHES NOMINAL IN |
| Power Line Frequency Rating Per Function in Hertz | 60.0 3RD RADIO INTERFERENCE THIRD FUNCTION |
| Power Line Frequency Rating Per Function in Hertz | 60.0 2ND RADIO INTERFERENCE SECOND FUNCTION |
| Power Line Frequency Rating Per Function in Hertz | 60.0 1ST RADIO INTERFERENCE FIRST FUNCTION |
| Functional Terminal Type and Quantity | 3 THREADED STUD OUTPUT SECOND FUNCTION |
| Functional Terminal Type and Quantity | 3 THREADED STUD INPUT FIRST FUNCTION |
| Source Impedance Rating Per Function | 50.0 OHMS 2ND RADIO INTERFERENCE SECOND FUNCTION |
| Source Impedance Rating Per Function | 50.0 OHMS 3RD RADIO INTERFERENCE THIRD FUNCTION |
| Source Impedance Rating Per Function | 50.0 OHMS 1ST RADIO INTERFERENCE FIRST FUNCTION |
| Body Width | 6.000 INCHES NOMINAL IN |
| Unthreaded Mounting Hole Diameter | 0.234 INCHES NOMINAL IN |
| Style Designator | RECTANGULAR TERMINAL/TERMINALS ON OPPOSITE SURFACES |
| Body Length | 2.750 INCHES NOMINAL IN |
| Operating Voltage Rating and Type Per Function | 440.0 VOLTS AC 1ST RADIO INTERFERENCE FIRST FUNCTION |
| Operating Voltage Rating and Type Per Function | 440.0 VOLTS AC 2ND RADIO INTERFERENCE SECOND FUNCTION |
| Operating Voltage Rating and Type Per Function | 440.0 VOLTS AC 3RD RADIO INTERFERENCE THIRD FUNCTION |
| Distance Between Centerlines of Mounting Facilities Parallel to Body Width | 5.000 INCHES NOMINAL IN |
| Principal Circuitry Type Per Function | INDUCTANCE-CAPACITANCE 3RD RADIO INTERFERENCE THIRD FUNCTION |
| Principal Circuitry Type Per Function | INDUCTANCE-CAPACITANCE 2ND RADIO INTERFERENCE SECOND FUNCTION |
| Principal Circuitry Type Per Function | INDUCTANCE-CAPACITANCE 1ST RADIO INTERFERENCE FIRST FUNCTION |
| Operating Current Rating Per Function in Amps | 1.0 2ND RADIO INTERFERENCE SECOND FUNCTION |
| Operating Current Rating Per Function in Amps | 1.0 3RD RADIO INTERFERENCE THIRD FUNCTION |
| Operating Current Rating Per Function in Amps | 1.0 1ST RADIO INTERFERENCE FIRST FUNCTION |
| Load Impedance Per Function | 50.0 OHMS 2ND RADIO INTERFERENCE SECOND FUNCTION |
| Load Impedance Per Function | 50.0 OHMS 3RD RADIO INTERFERENCE THIRD FUNCTION |
| Load Impedance Per Function | 50.0 OHMS 1ST RADIO INTERFERENCE FIRST FUNCTION |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| RF9899-2A | Ems Development Corporation Dba Ems Development Corp (USA) |
| M1008 | Mtk Electronics Inc (USA) |
| RF09899-2 | Ems Development Corporation Dba Ems Development Corp (USA) |
| 258S003-440 PRIMARY | Ems Development Corporation (USA) |
| Reference | Meaning |
|---|---|
| FC843 | 5/9 Secondary reference Fil-Coil International Llc |
| RF9899-2 | 5/9 Secondary reference Ems Development Corporation Dba Ems Development Corp |
NSN 5915-01-173-2904 is a Filter,radio Frequency Interfere, manufactured by Ems Development Corporation, classified under FSC 5915, Filters and Networks. Status: active.
NSN 5915-01-173-2904 has 4 manufacturer part numbers on file: RF9899-2A (Ems Development Corporation Dba Ems Development Corp), M1008 (Mtk Electronics Inc), RF09899-2 (Ems Development Corporation Dba Ems Development Corp), 258S003-440 (Ems Development Corporation).
1 possible match (shared part number, not a government interchangeability claim): 7930-01-509-9193. Verify interchangeability with system specifications before substitution.
Key specifications for 258S003-440: Mounting Facility Type and Quantity: 6 UNTHREADED HOLE(S) LOCATION NOT OTHERWISE SPECIFIED; Overall Height: 2.500 INCHES NOMINAL IN; Inclosure Type: ENCASED; Distance Between Centerlines of Mounting Facilities Parallel to Body Length: 3.490 INCHES NOMINAL IN. 28 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.
NSN 5915-01-173-2904 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.