The Ammeter, cataloged under National Stock Number 6625-00-581-7940, 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 Jewell Instruments Llc. 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 6625-00-581-7940 |
| Primary Part Number | 400R3001 |
| Item Name | Ammeter |
| FSC / FSG | 6625 / 66 — Electrical and Electronic Properties Measuring and Testing Instruments |
| Manufacturer | Jewell Instruments Llc |
| Status | ACTIVE |
| Circuit Construction Type | NONELECTRONIC |
| Mounting Facility Type and Quantity | 6 UNTHREADED HOLE(S) |
| Meter Body Diameter Behind Mounting Flange | 3.760 INCHES NOMINAL IN |
| FSC Application Data | TEST SET,ELECT. EQUIP. |
| Indicator Type | DIAL W/POINTER |
| Mounting Arrangement Style | SIX HOLE/STUD BOLT CIRCLE |
| Circuit Attachment Method and Quantity | 2 THREADED STUD |
| Meter Depth Behind Mounting Flange | 2.450 INCHES NOMINAL IN |
| Circuit Current for Which Designed | DC |
| Movement Type | MOVING IRON VANE |
| Accuracy in Percent | -2.0 TO 2.0 AT FULL SCALE SINGLE INDICATOR SINGLE RANGE |
| Overall Diameter | 4.600 INCHES NOMINAL IN |
| Panel for Which Designed | MAGNETIC |
| Power Source | EXTERNAL |
| Style Designator | ROUND FLUSH MTG |
| Mounting Hole Diameter | 0.150 INCHES NOMINAL IN |
| Features Provided | ZERO ADJUSTER |
| Scale Division Quantity | 50 SINGLE INDICATOR SINGLE RANGE |
| Movement Suspension Method | JEWEL PIVOT BASE |
| Mounting Bolt Circle Diameter | 4.125 INCHES NOMINAL IN |
| Color | UNABLE TO DECODE |
| Pointer Color | BLACK SINGLE INDICATOR SINGLE RANGE |
| Dial Scale Marking Color | BLACK SINGLE INDICATOR SINGLE RANGE |
| Special Markings | RED LINE AT 30 AMPERES |
| Scale Graduation Type | LINEAR SINGLE INDICATOR SINGLE RANGE |
| Measurement Range | +0.0 TO 50.0 AMPERES, DC 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 | JF |
| Weight | 2.1000 lbs |
| Cube | 0.2847 cu ft |
| Part Number | Manufacturer |
|---|---|
| 400R3001 | Jewell Instruments Llc (USA) |
| Reference | Meaning |
|---|---|
| 0555-0483B | C/1 Advisory reference — outside the item-of-supply concept Itw Gse Inc. |
| 0349-0483BPC8 | 5/9 Secondary reference Gse Holdings Inc. Dba Itw Military Gse Div Hobart Ground Systems |
| 0555-0483B | 3/9 Design control — primary reference Gse Holdings Inc. Dba Itw Military Gse Div Hobart Ground Systems |
| MA0014 | 5/9 Secondary reference Gse Holdings Inc. Dba Itw Military Gse Div Hobart Ground Systems |
| 0349-0483BPC8 | C/1 Advisory reference — outside the item-of-supply concept Itw Gse Inc. |
| MA0014 | C/1 Advisory reference — outside the item-of-supply concept Itw Gse Inc. |
NSN 6625-00-581-7940 is a Ammeter, manufactured by Jewell Instruments Llc, classified under FSC 6625, Electrical and Electronic Properties Measuring and Testing Instruments. Status: active.
NSN 6625-00-581-7940 has 1 manufacturer part number on file: 400R3001 (Jewell Instruments Llc).
Key specifications for 400R3001: Circuit Construction Type: NONELECTRONIC; Mounting Facility Type and Quantity: 6 UNTHREADED HOLE(S); Meter Body Diameter Behind Mounting Flange: 3.760 INCHES NOMINAL IN; FSC Application Data: TEST SET,ELECT. EQUIP.. 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.