The Control,alarm, cataloged under National Stock Number 6340-00-635-9703, is classified within Federal Supply Class 6340 (Aircraft Alarm and Signal Systems) of the Alarm, Signal, and Security Detection Systems group. The manufacturer of record is Lockheed Martin Corporation Div Rms - Mitchel Field. Government technical data includes 12 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 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 | 6340-00-635-9703 |
| Primary Part Number | 644876 |
| Item Name | Control,alarm |
| FSC / FSG | 6340 / 63 — Aircraft Alarm and Signal Systems |
| Manufacturer | Lockheed Martin Corporation Div Rms - Mitchel Field |
| Status | ACTIVE |
| FSC Application Data | CONTROL,ALARM,SHIPBOARD |
| Maximum Overall Width | 8.375 INCHES IN |
| Phase | SINGLE |
| Frequency in Hertz | 60.0 |
| Inclosure Type | ENCASED |
| Case Surface Treatment | ENAMEL |
| Maximum Overall Length | 12.625 INCHES IN |
| Maximum Overall Height | 9.688 INCHES IN |
| Mounting Method | BULKHEAD |
| Power Source | EXTERNAL |
| Maximum Voltage Rating in Volts | 115.0 AC |
| Material | STEEL CASE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 644876 PRIMARY | Lockheed Martin Corporation Div Rms - Mitchel Field (USA) |
NSN 6340-00-635-9703 is a Control,alarm, manufactured by Lockheed Martin Corporation Div Rms - Mitchel Field, classified under FSC 6340, Aircraft Alarm and Signal Systems. Status: active.
NSN 6340-00-635-9703 has 1 manufacturer part number on file: 644876 (Lockheed Martin Corporation Div Rms - Mitchel Field).
1 possible match (shared part number, not a government interchangeability claim): 6750-01-428-0711. Verify interchangeability with system specifications before substitution.
Key specifications for 644876: FSC Application Data: CONTROL,ALARM,SHIPBOARD; Maximum Overall Width: 8.375 INCHES IN; Phase: SINGLE; Frequency in Hertz: 60.0. 12 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). 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.