The Meter,arbitrary Scale, cataloged under National Stock Number 6625-01-032-8421, 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 Phaostron Instrument and Electronic Company. Government technical data includes 28 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 6625-01-032-8421 |
| Primary Part Number | 621-E506 |
| Item Name | Meter,arbitrary Scale |
| FSC / FSG | 6625 / 66 — Electrical and Electronic Properties Measuring and Testing Instruments |
| Manufacturer | Phaostron Instrument and Electronic Company |
| Status | ACTIVE |
| Mounting Facility Type and Quantity | 3 UNTHREADED HOLE(S) |
| Meter Body Diameter Behind Mounting Flange | 2.210 INCHES MAXIMUM IN |
| FSC Application Data | TEST SET,ELECT. EQUIP. |
| Indicator Type | DIAL W/POINTER |
| Mounting Arrangement Style | THREE HOLE/STUD BOLT CIRCLE |
| Circuit Attachment Method and Quantity | 2 SOLDER LUG AND 2 THREADED STUD |
| Meter Depth Behind Mounting Flange | 2.120 INCHES MAXIMUM IN |
| Circuit Current for Which Designed | DC |
| Movement Type | MOVING COIL, PERMANENT MAGNET |
| Accuracy in Percent | -2.0 TO 2.0 AT FULL SCALE SINGLE INDICATOR ALL RANGES |
| Overall Diameter | 2.695 INCHES MAXIMUM IN |
| Dielectric Withstanding Voltage in Volts | 3000.0 |
| Style Designator | ROUND FLUSH MTG |
| Mounting Hole Diameter | 0.125 INCHES NOMINAL IN |
| Features Provided | KNIFE EDGE POINTER AND MAGNETIC SHIELD AND ZERO ADJUSTER |
| Scale Division Quantity | 30 SINGLE INDICATOR SECOND RANGE |
| Scale Division Quantity | 20 SINGLE INDICATOR FIRST RANGE |
| Movement Suspension Method | JEWEL PIVOT BASE |
| Mounting Bolt Circle Diameter | 2.440 INCHES NOMINAL IN |
| Color | UNABLE TO DECODE |
| Pointer Color | BLACK SINGLE INDICATOR ALL RANGES |
| Surface Treatment | ENAMEL SEMIGLOSS |
| Environmental Protection | SHOCK RESISTANT AND VIBRATION RESISTANT |
| Unable to Decode | UNABLE TO DECODE |
| Dial Scale Marking Color | BLACK SINGLE INDICATOR ALL RANGES |
| Material | STEEL |
| Sensitivity Rating | 1.5 MILLIAMPERES |
| Scale Graduation Type | LINEAR SINGLE INDICATOR ALL RANGES |
| 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 | J |
| Weight | 0.7200 lbs |
| Cube | 0.0480 cu ft |
| Part Number | Manufacturer |
|---|---|
| 621-E506 | Phaostron Instrument and Electronic Company (USA) |
| MMI-68344-1 | Custom Metering Company Inc (USA) |
| Reference | Meaning |
|---|---|
| MMI-68344-1 | 5/9 Secondary reference Metermaster Inc Metermod Div |
| 68344-1 | 3/2 Design control — primary reference U.S. Government activity |
| 621 | 5/1 Secondary reference Phaostron Instrument and Electronic Company |
NSN 6625-01-032-8421 is a Meter,arbitrary Scale, manufactured by Phaostron Instrument and Electronic Company, classified under FSC 6625, Electrical and Electronic Properties Measuring and Testing Instruments. Status: active.
NSN 6625-01-032-8421 has 2 manufacturer part numbers on file: 621-E506 (Phaostron Instrument and Electronic Company), MMI-68344-1 (Custom Metering Company Inc).
1 possible match (shared part number, not a government interchangeability claim): 9340-01-178-8999. Verify interchangeability with system specifications before substitution.
Key specifications for 621-E506: Mounting Facility Type and Quantity: 3 UNTHREADED HOLE(S); Meter Body Diameter Behind Mounting Flange: 2.210 INCHES MAXIMUM IN; FSC Application Data: TEST SET,ELECT. EQUIP.; Indicator Type: DIAL W/POINTER. 28 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.