The Ammeter, cataloged under National Stock Number 6625-01-645-9571, 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 Mmc Metrology Lab, Inc. Dba Mmc Metrology Lab Inc. Government technical data includes 25 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6625-01-645-9571 |
| Primary Part Number | MR49W4000ACAAH |
| Item Name | Ammeter |
| FSC / FSG | 6625 / 66 — Electrical and Electronic Properties Measuring and Testing Instruments |
| Manufacturer | Mmc Metrology Lab, Inc. Dba Mmc Metrology Lab Inc |
| Status | ACTIVE |
| Mounting Facility Type and Quantity | 4 THREADED STUD(S) |
| Meter Body Diameter Behind Mounting Flange | 3.980 INCHES MAXIMUM IN |
| FSC Application Data | TEST SET ELECTRONIC |
| Indicator Type | DIAL W/POINTER |
| Mounting Arrangement Style | FOUR HOLE/STUD RECTANGULAR/SQUARE |
| Circuit Attachment Method and Quantity | 2 THREADED STUD |
| Meter Depth Behind Mounting Flange | 10.0 INCHES MAXIMUM IN |
| Circuit Current for Which Designed | AC |
| Scale Selection Method | SWITCH |
| Movement Type | MOVING IRON VANE |
| Accuracy in Percent | -1.5 TO 1.5 AT FULL SCALE SINGLE INDICATOR SINGLE RANGE |
| Center to Center Distance Between Mounting Facilities Parallel to Length | 3.376 INCHES NOMINAL IN |
| Mounting Stud Diameter | 0.250 INCHES NOMINAL IN |
| Panel for Which Designed | MAGNETIC |
| Power Source | EXTERNAL |
| Style Designator | RECTANGULAR FLUSH MTG |
| Features Provided | MAGNETIC SHIELD AND ZERO ADJUSTER |
| Scale Division Quantity | 30 SINGLE INDICATOR SINGLE RANGE |
| Color | UNABLE TO DECODE |
| Pointer Color | BLACK SINGLE INDICATOR SINGLE RANGE |
| Center to Center Distance Between Mounting Facilities Parallel to Width | 3.376 INCHES NOMINAL IN |
| Test Data Document | 81349-MIL-M-16034 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.). |
| Dial Scale Marking Color | BLACK SINGLE INDICATOR SINGLE RANGE |
| Scale Graduation Type | LINEAR 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) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| MR49W4000ACAAH PRIMARY | Mmc Metrology Lab, Inc. Dba Mmc Metrology Lab Inc (USA) |
NSN 6625-01-645-9571 is a Ammeter, manufactured by Mmc Metrology Lab, Inc. Dba Mmc Metrology Lab Inc, classified under FSC 6625, Electrical and Electronic Properties Measuring and Testing Instruments. Status: active.
NSN 6625-01-645-9571 has 1 manufacturer part number on file: MR49W4000ACAAH (Mmc Metrology Lab, Inc. Dba Mmc Metrology Lab Inc).
Key specifications for MR49W4000ACAAH: Mounting Facility Type and Quantity: 4 THREADED STUD(S); Meter Body Diameter Behind Mounting Flange: 3.980 INCHES MAXIMUM IN; Overall Height: 4.250 INCHES MINIMUM AND 4.750 INCHES MAXIMUM IN; FSC Application Data: TEST SET ELECTRONIC. 25 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.