The Meter,audio Level, cataloged under National Stock Number 6625-00-643-3940, is classified within Federal Supply Class 6625 (Electrical and Electronic Properties Measuring and Testing Instruments) of the Instruments and Laboratory Equipment group. The manufacturer of record is American Instrument Corp. Government technical data includes 25 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 6625-00-643-3940 |
| Primary Part Number | 525 |
| Item Name | Meter,audio Level |
| FSC / FSG | 6625 / 66 — Electrical and Electronic Properties Measuring and Testing Instruments |
| Manufacturer | American Instrument Corp |
| Status | ACTIVE |
| Mounting Facility Type and Quantity | 4 THREADED HOLE(S) |
| Meter Body Diameter Behind Mounting Flange | 2.156 INCHES NOMINAL IN |
| FSC Application Data | TEST SET,ELECT. EQUIP. |
| Indicator Type | DIAL W/POINTER |
| Mounting Arrangement Style | FOUR HOLE/STUD RECTANGULAR/SQUARE |
| Circuit Attachment Method and Quantity | 2 THREADED STUD |
| Meter Depth Behind Mounting Flange | 1.625 INCHES NOMINAL IN |
| Circuit Current for Which Designed | AC |
| Scale Selection Method | TERMINAL |
| Accuracy in Percent | -1.5 TO 1.5 AT FULL SCALE SINGLE INDICATOR SINGLE RANGE |
| Center to Center Distance Between Mounting Facilities Parallel to Length | 1.750 INCHES NOMINAL IN |
| Power Source | EXTERNAL |
| Style Designator | RECTANGULAR FLUSH MTG |
| Mounting Hole Diameter | 0.112 INCHES NOMINAL IN |
| Features Provided | ZERO ADJUSTER |
| Color | UNABLE TO DECODE |
| Pointer Color | BLACK SINGLE INDICATOR SINGLE RANGE |
| Center to Center Distance Between Mounting Facilities Parallel to Width | 1.750 INCHES NOMINAL IN |
| Dial Scale Marking Color | BLACK AND RED SINGLE INDICATOR SINGLE RANGE |
| Special Markings | BLACK FROM M20 TO 0 ON DIV SCALE; RED FROM @O TO P3 ON DIV SCALE |
| Material | PLASTIC |
| Scale Graduation Type | NONLINEAR SINGLE INDICATOR SINGLE RANGE |
| Measurement Range | -20.0 TO 3.0 DECIBELS ABOVE OR BELOW ONE WATT SINGLE INDICATOR SINGLE RANGE |
| Nuclear Hardness Critical Feature | NONHARDENED |
| Installation Design | PANEL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Shelf Life Code | 0 |
| Criticality Code | X |
| Unit of Issue | EA |
| Acquisition advice code | X |
| Part Number | Manufacturer |
|---|---|
| 525 | American Instrument Corp (USA) |
| Reference | Meaning |
|---|---|
| 525 | 5/9 Secondary reference U.S. Government activity |
| L60172 | 3/9 Design control — primary reference Remler Co |
NSN 6625-00-643-3940 is a Meter,audio Level, manufactured by American Instrument Corp, classified under FSC 6625, Electrical and Electronic Properties Measuring and Testing Instruments. Status: active.
NSN 6625-00-643-3940 has 1 manufacturer part number on file: 525 (American Instrument Corp).
Key specifications for 525: Mounting Facility Type and Quantity: 4 THREADED HOLE(S); Meter Body Diameter Behind Mounting Flange: 2.156 INCHES NOMINAL IN; Overall Height: 2.375 INCHES NOMINAL IN; FSC Application Data: TEST SET,ELECT. EQUIP.. 25 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.