The Ammeter, cataloged under National Stock Number 6625-00-649-4822, 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 Westinghouse Electric Corp. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 6 manufacturer part numbers 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 6625-00-649-4822 |
| Primary Part Number | 1542220 |
| Item Name | Ammeter |
| FSC / FSG | 6625 / 66 — Electrical and Electronic Properties Measuring and Testing Instruments |
| Manufacturer | Westinghouse Electric Corp |
| Status | ACTIVE |
| Mounting Facility Type and Quantity | 4 UNTHREADED HOLE(S) |
| Mounting Arrangement Style | FOUR HOLE/STUD RECTANGULAR/SQUARE |
| Circuit Attachment Method and Quantity | 2 THREADED STUD |
| Circuit Current for Which Designed | DC |
| Accuracy in Percent | -1.0 TO 1.0 AT FULL SCALE SINGLE INDICATOR SINGLE RANGE |
| Center to Center Distance Between Mounting Facilities Parallel to Length | 2.250 INCHES NOMINAL IN |
| Style Designator | RECTANGULAR SURFACE MTG |
| Mounting Hole Diameter | 0.120 INCHES NOMINAL IN |
| Scale Division Quantity | 50 SINGLE INDICATOR SINGLE RANGE |
| Color | UNABLE TO DECODE |
| Center to Center Distance Between Mounting Facilities Parallel to Width | 2.250 INCHES NOMINAL IN |
| Dial Scale Marking Color | BLACK SINGLE INDICATOR SINGLE RANGE |
| Sensitivity Rating | 50.0 MILLIVOLTS |
| Measurement Range | -500.0 TO 500.0 AMPERES, DC SINGLE 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 | X |
| Part Number | Manufacturer |
|---|---|
| 1542220 PRIMARY | Westinghouse Electric Corp (USA) |
| 31J42PC13 PRIMARY | Westinghouse Electric Corp (USA) |
| 31J38PC39 PRIMARY | Westinghouse Electric Corp (USA) |
| 31J42PC24 PRIMARY | Westinghouse Electric Corp (USA) |
| 1542221 PRIMARY | Westinghouse Electric Corp (USA) |
| 31J38PC38 PRIMARY | Westinghouse Electric Corp (USA) |
| Reference | Meaning |
|---|---|
| 228-62-01307PC24 | 3/2 Design control — primary reference U.S. Government activity |
| 228-62-01333PC39 | 3/2 Design control — primary reference U.S. Government activity |
| 228-62-01307PC13 | 3/2 Design control — primary reference U.S. Government activity |
| 228-62-01333PC38 | 3/2 Design control — primary reference U.S. Government activity |
NSN 6625-00-649-4822 is a Ammeter, manufactured by Westinghouse Electric Corp, classified under FSC 6625, Electrical and Electronic Properties Measuring and Testing Instruments. Status: active.
NSN 6625-00-649-4822 has 6 manufacturer part numbers on file: 1542220 (Westinghouse Electric Corp), 31J42PC13 (Westinghouse Electric Corp), 31J38PC39 (Westinghouse Electric Corp), 31J42PC24 (Westinghouse Electric Corp), 1542221 (Westinghouse Electric Corp) and 1 more.
1 possible match (shared part number, not a government interchangeability claim): 5365-01-205-4435. Verify interchangeability with system specifications before substitution.
Key specifications for 1542220: Mounting Facility Type and Quantity: 4 UNTHREADED HOLE(S); Overall Height: 3.000 INCHES NOMINAL IN; Mounting Arrangement Style: FOUR HOLE/STUD RECTANGULAR/SQUARE; Circuit Attachment Method and Quantity: 2 THREADED STUD. 15 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.