The Voltmeter, cataloged under National Stock Number 6625-00-643-1744, 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 Phaostron Instrument and Electronic Company. Government technical data includes 28 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 6625-00-643-1744 |
| Primary Part Number | 631-16188 |
| Item Name | Voltmeter |
| FSC / FSG | 6625 / 66 — Electrical and Electronic Properties Measuring and Testing Instruments |
| Manufacturer | Phaostron Instrument and Electronic Company |
| Status | ACTIVE |
| Mounting Facility Type and Quantity | 3 UNTHREADED HOLE(S) |
| Meter Body Diameter Behind Mounting Flange | 2.800 INCHES NOMINAL IN |
| FSC Application Data | TEST SET,ELECT. EQUIP. |
| Indicator Type | DIAL W/POINTER |
| Mounting Arrangement Style | THREE HOLE/STUD BOLT CIRCLE |
| Circuit Attachment Method and Quantity | 2 THREADED STUD |
| Meter Depth Behind Mounting Flange | 2.875 INCHES MAXIMUM IN |
| Circuit Current for Which Designed | DC |
| Scale Selection Method | TERMINAL |
| Movement Type | MOVING COIL, PERMANENT MAGNET |
| Accuracy in Percent | -1.0 TO 1.0 AT FULL SCALE SINGLE INDICATOR ALL RANGES |
| Overall Diameter | 3.510 INCHES NOMINAL IN |
| Power Source | EXTERNAL |
| Style Designator | ROUND FLUSH MTG |
| Mounting Hole Diameter | 0.143 INCHES MINIMUM AND 0.157 INCHES MAXIMUM IN |
| Features Provided | ZERO ADJUSTER |
| Movement Suspension Method | JEWEL PIVOT BASE |
| Mounting Bolt Circle Diameter | 3.160 INCHES NOMINAL IN |
| Reliability Indicator | NOT ESTABLISHED |
| Color | UNABLE TO DECODE |
| Pointer Color | BLACK SINGLE INDICATOR ALL RANGES |
| Environmental Protection | FUNGUS RESISTANT AND HERMETIC AND SHOCK RESISTANT AND VIBRATION RESISTANT |
| Mounting Stud Length | 0.500 INCHES NOMINAL IN |
| Dial Scale Marking Color | BLACK SINGLE INDICATOR ALL RANGES |
| Special Markings | GREEN BAND FROM 97.5 TO 102.5; CHECK EQUIPMENT IF OUTSIDE GREEN BAND; VOLTAGES NEAR RESPECTIVE TERMINALS |
| Material | PLASTIC |
| Sensitivity Rating | 300.0 OHMS PER VOLT |
| Scale Graduation Type | NONLINEAR SINGLE INDICATOR ALL RANGES |
| 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 | Y |
| Part Number | Manufacturer |
|---|---|
| 631-16188 | Phaostron Instrument and Electronic Company (USA) |
| Reference | Meaning |
|---|---|
| ME1046ISSUEA | 3/9 Design control — primary reference U.S. Government activity |
| ME1046ISSUE1 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| A115035 | 5/9 Secondary reference Fifty Avenue L Inc |
| 631 | 5/1 Secondary reference Phaostron Instrument and Electronic Company |
NSN 6625-00-643-1744 is a Voltmeter, manufactured by Phaostron Instrument and Electronic Company, classified under FSC 6625, Electrical and Electronic Properties Measuring and Testing Instruments. Status: active.
NSN 6625-00-643-1744 has 1 manufacturer part number on file: 631-16188 (Phaostron Instrument and Electronic Company).
Key specifications for 631-16188: Mounting Facility Type and Quantity: 3 UNTHREADED HOLE(S); Meter Body Diameter Behind Mounting Flange: 2.800 INCHES NOMINAL IN; FSC Application Data: TEST SET,ELECT. EQUIP.; Indicator Type: DIAL W/POINTER. 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.
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.