The Ammeter, cataloged under National Stock Number 6625-01-258-4112, 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 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 6625-01-258-4112 |
| Primary Part Number | 621-2902631-16 |
| Item Name | Ammeter |
| FSC / FSG | 6625 / 66 — Electrical and Electronic Properties Measuring and Testing Instruments |
| Manufacturer | Phaostron Instrument and Electronic Company |
| Status | ACTIVE |
| Indicator Type | DIAL W/POINTER |
| Circuit Current for Which Designed | DC |
| Accuracy in Percent | -2.0 TO 2.0 AT FULL SCALE FIRST INDICATOR SINGLE RANGE |
| Accuracy in Percent | -2.0 TO 2.0 AT FULL SCALE SECOND INDICATOR ALL RANGES |
| Scale Division Quantity | 4 FIRST INDICATOR SINGLE RANGE |
| Dial Scale Marking Color | BLACK FIRST INDICATOR SINGLE RANGE |
| Dial Scale Marking Color | GREEN SECOND INDICATOR SECOND RANGE |
| Dial Scale Marking Color | RED SECOND INDICATOR FIRST RANGE |
| Dial Scale Marking Color | RED SECOND INDICATOR FOURTH RANGE |
| Dial Scale Marking Color | WHITE SECOND INDICATOR THIRD RANGE |
| Scale Graduation Type | LINEAR FIRST INDICATOR SINGLE RANGE |
| 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 | Z |
| Weight | 0.5078 lbs |
| Cube | 0.0494 cu ft |
| Part Number | Manufacturer |
|---|---|
| 621-2902631-16 PRIMARY | Phaostron Instrument and Electronic Company (USA) |
| Reference | Meaning |
|---|---|
| 2902631-16 | 7/2 Vendor item drawing reference Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| 125R-2902631-16 | 5/9 Secondary reference Simpson Electric Company, Inc. |
| 2521-2902631-16 | 5/9 Secondary reference Solartron Electronics Inc Weston Instruments Div |
NSN 6625-01-258-4112 is a Ammeter, manufactured by Phaostron Instrument and Electronic Company, classified under FSC 6625, Electrical and Electronic Properties Measuring and Testing Instruments. Status: active.
NSN 6625-01-258-4112 has 1 manufacturer part number on file: 621-2902631-16 (Phaostron Instrument and Electronic Company).
Key specifications for 621-2902631-16: Indicator Type: DIAL W/POINTER; Circuit Current for Which Designed: DC; Accuracy in Percent: -2.0 TO 2.0 AT FULL SCALE FIRST INDICATOR SINGLE RANGE; Accuracy in Percent: -2.0 TO 2.0 AT FULL SCALE SECOND INDICATOR ALL RANGES. 12 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.