The Ammeter, cataloged under National Stock Number 6625-01-027-3765, 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 Raytheon Company. Government technical data includes 26 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 6625-01-027-3765 |
| Primary Part Number | 557962-1 |
| Item Name | Ammeter |
| FSC / FSG | 6625 / 66 — Electrical and Electronic Properties Measuring and Testing Instruments |
| Manufacturer | Raytheon Company |
| Status | ACTIVE |
| Circuit Construction Type | NONELECTRONIC |
| Mounting Facility Type and Quantity | 2 THREADED STUD(S) |
| Meter Body Diameter Behind Mounting Flange | 2.700 INCHES MAXIMUM IN |
| FSC Application Data | TEST SET,ELECT. EQUIP. |
| Indicator Type | DIAL W/POINTER |
| Mounting Arrangement Style | TWO HOLE/STUD |
| Circuit Attachment Method and Quantity | 2 THREADED STUD |
| Meter Depth Behind Mounting Flange | 1.830 INCHES NOMINAL IN |
| Circuit Current for Which Designed | DC |
| Scale Selection Method | TERMINAL |
| Movement Type | MOVING IRON VANE |
| Accuracy in Percent | -2.0 TO 2.0 AT FULL SCALE SINGLE INDICATOR ALL RANGES |
| Mounting Stud Diameter | 0.112 INCHES NOMINAL IN |
| Special Test Features | MEETS REQUIREMENTS OF ANSI C-39.1 |
| Panel for Which Designed | NONMAGNETIC |
| Dielectric Withstanding Voltage in Volts | 2600.0 |
| Power Source | EXTERNAL |
| Style Designator | RECTANGULAR FLUSH MTG |
| Features Provided | EXTERNAL SHUNTING AND ZERO ADJUSTER |
| Distance Between Mounting Facility Centers | 1.320 INCHES NOMINAL IN |
| Scale Division Quantity | 50 SINGLE INDICATOR ALL RANGES |
| Movement Suspension Method | TAUT BAND |
| Color | UNABLE TO DECODE |
| Pointer Color | BLACK SINGLE INDICATOR ALL RANGES |
| Environmental Protection | SHOCK RESISTANT AND VIBRATION RESISTANT |
| Mounting Stud Length | 0.500 INCHES NOMINAL IN |
| 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 | 0.1000 lbs |
| Cube | 0.0180 cu ft |
| Part Number | Manufacturer |
|---|---|
| 557962-1 PRIMARY | Raytheon Company (USA) |
| Reference | Meaning |
|---|---|
| 251-324-ECNG | 5/1 Secondary reference Yokogawa Corporation of America |
| 50-251-324 ECNGMODIFIED | 5/9 Secondary reference General Electric Co Instrument Products Section |
NSN 6625-01-027-3765 is a Ammeter, manufactured by Raytheon Company, classified under FSC 6625, Electrical and Electronic Properties Measuring and Testing Instruments. Status: active.
NSN 6625-01-027-3765 has 1 manufacturer part number on file: 557962-1 (Raytheon Company).
1 possible match (shared part number, not a government interchangeability claim): 2510-01-187-7031. Verify interchangeability with system specifications before substitution.
Key specifications for 557962-1: Circuit Construction Type: NONELECTRONIC; Mounting Facility Type and Quantity: 2 THREADED STUD(S); Meter Body Diameter Behind Mounting Flange: 2.700 INCHES MAXIMUM IN; Overall Height: 3.320 INCHES NOMINAL IN. 26 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.