The Ammeter, cataloged under National Stock Number 6625-00-553-4778, is classified within Federal Supply Class 6625 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier. Government technical data includes 28 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 6625-00-553-4778 |
| Primary Part Number | 60A21C78 |
| Item Name | Ammeter |
| FSC / FSG | 6625 / 66 — No Item Name Available |
| Manufacturer | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
| Status | ACTIVE |
| Scale Division Quantity | 100 SINGLE INDICATOR SINGLE RANGE |
| Dielectric Withstanding Voltage in Volts | 2000.0 |
| Style Designator | ROUND FLUSH MTG |
| Color | UNABLE TO DECODE |
| Nuclear Hardness Critical Feature | NONHARDENED |
| Circuit Attachment Method and Quantity | 2 SOLDER LUG AND 2 THREADED STUD |
| Meter Body Diameter Behind Mounting Flange | 2.675 INCHES NOMINAL IN |
| Accuracy in Percent | -2.0 TO 2.0 AT FULL SCALE SINGLE INDICATOR SINGLE RANGE |
| Overall Diameter | 3.500 INCHES NOMINAL IN |
| Movement Type | MOVING COIL, PERMANENT MAGNET |
| Panel for Which Designed | NONMAGNETIC |
| Movement Suspension Method | JEWEL PIVOT BASE |
| Special Markings | NULL INDICATOR |
| Mounting Bolt Circle Diameter | 3.160 INCHES NOMINAL IN |
| Meter Depth Behind Mounting Flange | 1.063 INCHES NOMINAL IN |
| Environmental Protection | SHOCK RESISTANT AND VIBRATION RESISTANT |
| Material | STEEL |
| Indicator Type | DIAL W/POINTER |
| Installation Design | PANEL |
| FSC Application Data | TEST SET,ELECTRONIC EQUIPMENT |
| Mounting Facility Type and Quantity | 3 SCREW AND 3 UNTHREADED HOLE(S) |
| Measurement Range | -100.0 TO 100.0 MICROAMPERES, DC SINGLE INDICATOR SINGLE RANGE |
| Power Source | EXTERNAL |
| Mounting Hole Diameter | 0.150 INCHES NOMINAL IN |
| Circuit Current for Which Designed | DC |
| Scale Graduation Type | LINEAR SINGLE INDICATOR SINGLE RANGE |
| Sensitivity Rating | 20.0 MILLIVOLTS |
| Dial Scale Marking Color | BLACK SINGLE INDICATOR SINGLE RANGE |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Shelf Life Code | 0 |
| Criticality Code | N |
| Unit of Issue | EA |
| SMR Code | JN |
| Weight | 0.0300 lbs |
| Cube | 0.0250 cu ft |
| Part Number | Manufacturer |
|---|---|
| HS3Z100-0-100AMP | Jewell Instruments Llc (USA) |
| 60A21C78 PRIMARY | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
| HS3Z | Jewell Instruments Llc (USA) |
| HS3A | Marion Electrical Instrument Co |
| HS3A | Jewell Instruments Llc (USA) |
NSN 6625-00-553-4778 is a Ammeter, manufactured by Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier, classified under FSC 6625 (No Item Name Available). Status: active.
NSN 6625-00-553-4778 has 5 cross-referenced part numbers: HS3Z100-0-100AMP (Jewell Instruments Llc), 60A21C78 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier), HS3Z (Jewell Instruments Llc), HS3A (Marion Electrical Instrument Co), HS3A (Jewell Instruments Llc).
There are 12 known substitutes for 6625-00-553-4778: 6625-00-325-0977, 6625-01-206-9966, 6625-00-056-4544 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for 60A21C78: Scale Division Quantity: 100 SINGLE INDICATOR SINGLE RANGE; Dielectric Withstanding Voltage in Volts: 2000.0; Style Designator: ROUND FLUSH MTG; Color: UNABLE TO DECODE. 30 total characteristics are documented in the Federal Logistics Information System.