The Filter,radio Frequency Interfere, cataloged under National Stock Number 5915-01-550-4523, is classified within Federal Supply Class 5915 (Filters and Networks) of the Electrical and Electronic Equipment Components group. The manufacturer of record is The Captor Corporation. Government technical data includes 10 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5915-01-550-4523 |
| Primary Part Number | A-8181 |
| Item Name | Filter,radio Frequency Interfere |
| FSC / FSG | 5915 / 59 — Filters and Networks |
| Manufacturer | The Captor Corporation |
| Status | ACTIVE |
| Inclosure Type | ENCASED |
| Functional Terminal Type and Quantity | 3 QUICK DISCONNECT, MALE INPUT-OUTPUT/GROUND AND 2 THREADED STUD INPUT-OUTPUT/GROUND LOCATION NOT OTHERWISE SPECIFIED |
| Source Impedance Rating Per Function | 1.0 OHMS SINGLE BAND PASS LOCATION NOT OTHERWISE SPECIFIED |
| Body Width | 1.250 INCHES NOMINAL IN |
| Body Height | 4.380 INCHES NOMINAL IN |
| Style Designator | RECTANGULAR TERMINAL/TERMINALS ON OPPOSITE SURFACES |
| Features Provided | FUNGUS RESISTANT AND HUMIDITY PROOF AND SHOCK RESISTANT |
| Body Length | 2.500 INCHES NOMINAL IN |
| Operating Voltage Rating and Type Per Function | 125.0 VOLTS DC 1ST BAND PASS AND 177.0 VOLTS AC 2ND BAND PASS LOCATION NOT OTHERWISE SPECIFIED |
| Nuclear Hardness Critical Feature | HARDENED |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | H |
| Part Number | Manufacturer |
|---|---|
| A-8181 PRIMARY | The Captor Corporation (USA) |
| Reference | Meaning |
|---|---|
| A3274221-001 | 1/2 Source control — Government-approved source U.S. Government activity |
NSN 5915-01-550-4523 is a Filter,radio Frequency Interfere, manufactured by The Captor Corporation, classified under FSC 5915, Filters and Networks. Status: active.
NSN 5915-01-550-4523 has 1 manufacturer part number on file: A-8181 (The Captor Corporation).
1 possible match (shared part number, not a government interchangeability claim): 3120-01-645-2919. Verify interchangeability with system specifications before substitution.
Key specifications for A-8181: Overall Height: 6.620 INCHES MAXIMUM IN; Inclosure Type: ENCASED; Functional Terminal Type and Quantity: 3 QUICK DISCONNECT, MALE INPUT-OUTPUT/GROUND AND 2 THREADED STUD INPUT-OUTPUT/GROUND LOCATION NOT OTHERWISE SPECIFIED; Source Impedance Rating Per Function: 1.0 OHMS SINGLE BAND PASS LOCATION NOT OTHERWISE SPECIFIED. 10 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 5915-01-550-4523 has DEMIL Code B. 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.