The Ammeter, cataloged under National Stock Number 6625-00-421-7628, is classified within Federal Supply Class 6625 (Electrical and Electronic Properties Measuring and Testing Instruments) of the Instruments and Laboratory Equipment group. Government technical data includes 27 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 6625-00-421-7628 |
| Item Name | Ammeter |
| FSC / FSG | 6625 / 66 — Electrical and Electronic Properties Measuring and Testing Instruments |
| Status | ACTIVE |
| Circuit Construction Type | NONELECTRONIC |
| Mounting Facility Type and Quantity | 4 UNTHREADED HOLE(S) |
| Meter Body Diameter Behind Mounting Flange | 2.255 INCHES NOMINAL IN |
| Indicator Type | DIAL W/POINTER |
| Mounting Arrangement Style | FOUR HOLE/STUD BOLT CIRCLE |
| Circuit Attachment Method and Quantity | 2 BINDING POST |
| Meter Depth Behind Mounting Flange | 1.125 INCHES NOMINAL IN |
| Circuit Current for Which Designed | AC |
| Scale Selection Method | TERMINAL |
| Movement Type | MOVING COIL, PERMANENT MAGNET |
| Accuracy in Percent | -2.0 TO 2.0 AT FULL SCALE SINGLE INDICATOR SINGLE RANGE |
| Panel for Which Designed | MAGNETIC |
| Dielectric Withstanding Voltage in Volts | 2000.0 |
| Power Source | EXTERNAL |
| Style Designator | ROUND FLUSH MTG W/4 TABS |
| Mounting Hole Diameter | 0.188 INCHES NOMINAL IN |
| Features Provided | SELF-ILLUMINATION FACILITY |
| Scale Division Quantity | 25 SINGLE INDICATOR SINGLE RANGE |
| Movement Suspension Method | JEWEL PIVOT BASE |
| Mounting Bolt Circle Diameter | 2.626 INCHES NOMINAL IN |
| Color | UNABLE TO DECODE |
| Pointer Color | BLACK SINGLE INDICATOR SINGLE RANGE |
| Environmental Protection | DUST RESISTANT |
| Dial Scale Marking Color | YELLOW SINGLE INDICATOR SINGLE RANGE |
| Scale Graduation Type | LINEAR SINGLE INDICATOR SINGLE RANGE |
| Measurement Range | +0.0 TO 75.0 AMPERES, AC SINGLE INDICATOR SINGLE RANGE |
| Nuclear Hardness Critical Feature | NONHARDENED |
| 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 |
| Reference | Meaning |
|---|---|
| 520100 | 3/9 Design control — primary reference Solartron Electronics Inc Weston Instruments Div |
NSN 6625-00-421-7628 is a Ammeter, classified under FSC 6625, Electrical and Electronic Properties Measuring and Testing Instruments. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4810-01-349-7231. Verify interchangeability with system specifications before substitution.
Key specifications for 6625-00-421-7628: Circuit Construction Type: NONELECTRONIC; Mounting Facility Type and Quantity: 4 UNTHREADED HOLE(S); Meter Body Diameter Behind Mounting Flange: 2.255 INCHES NOMINAL IN; Overall Height: 2.375 INCHES NOMINAL IN. 27 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.