The Ammeter, cataloged under National Stock Number 6625-00-643-2322, 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 Custom Metering Company Inc. Government technical data includes 29 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 6625-00-643-2322 |
| Primary Part Number | 331S-CUS9614 |
| Item Name | Ammeter |
| FSC / FSG | 6625 / 66 — Electrical and Electronic Properties Measuring and Testing Instruments |
| Manufacturer | Custom Metering Company Inc |
| 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,ELECTRONIC EQUIPMENT |
| 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 | 1.660 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 ALL RANGES |
| Overall Diameter | 3.500 INCHES NOMINAL IN |
| Dielectric Withstanding Voltage in Volts | 2000.0 |
| Style Designator | ROUND FLUSH MTG |
| Mounting Hole Diameter | 0.150 INCHES NOMINAL IN |
| Features Provided | ZERO ADJUSTER |
| Scale Division Quantity | 51 SINGLE INDICATOR ALL RANGES |
| Movement Suspension Method | JEWEL PIVOT BASE |
| Mounting Bolt Circle Diameter | 3.160 INCHES NOMINAL IN |
| Color | UNABLE TO DECODE |
| Pointer Color | BLACK SINGLE INDICATOR ALL RANGES |
| Dial Scale Marking Color | BLACK SINGLE INDICATOR ALL RANGES |
| Special Markings | CAPTION MILLIAMPERES A.C. CENTER OF DIAL BELOW DIV SCALE |
| Material | PLASTIC |
| Sensitivity Rating | 250.0 MILLIVOLTS |
| Scale Graduation Type | LINEAR SINGLE INDICATOR ALL RANGES |
| Measurement Range | +0.0 TO 50.0 MILLIAMPERES, AC SINGLE INDICATOR FIRST RANGE |
| Measurement Range | +0.0 TO 500.0 MILLIAMPERES, AC SINGLE INDICATOR SECOND 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 | JN |
| Weight | 0.7800 lbs |
| Cube | 0.0487 cu ft |
| Part Number | Manufacturer |
|---|---|
| 331S-CUS9614 PRIMARY | Custom Metering Company Inc (USA) |
| Reference | Meaning |
|---|---|
| M0DEL-331-S | C/1 Advisory reference — outside the item-of-supply concept Triplett (bluffton) Corporation Dba Lfe Instruments |
| 331S | 5/1 Secondary reference Triplett (bluffton) Corporation Dba Lfe Instruments |
NSN 6625-00-643-2322 is a Ammeter, manufactured by Custom Metering Company Inc, classified under FSC 6625, Electrical and Electronic Properties Measuring and Testing Instruments. Status: active.
NSN 6625-00-643-2322 has 1 manufacturer part number on file: 331S-CUS9614 (Custom Metering Company Inc).
2 possible matches (shared part number, not a government interchangeability claim): 6625-01-316-2631, 2920-01-445-6535. Verify interchangeability with system specifications before substitution.
Key specifications for 331S-CUS9614: 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,ELECTRONIC EQUIPMENT; Indicator Type: DIAL W/POINTER. 29 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.