The Meter,electrical Frequency, cataloged under National Stock Number 6625-00-855-3564, 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 16 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6625-00-855-3564 |
| Primary Part Number | 291-400-07-02 |
| Item Name | Meter,electrical Frequency |
| FSC / FSG | 6625 / 66 — Electrical and Electronic Properties Measuring and Testing Instruments |
| Manufacturer | Phaostron Instrument and Electronic Company |
| Status | ACTIVE |
| Register Quantity | 1 |
| Mounting Facility Type and Quantity | 3 THREADED HOLE(S) |
| Meter Body Diameter Behind Mounting Flange | 2.156 INCHES NOMINAL IN |
| Mounting Arrangement Style | THREE HOLE/STUD BOLT CIRCLE |
| Circuit Attachment Method and Quantity | 2 SOLDER STUD |
| Meter Depth Behind Mounting Flange | 1.520 INCHES NOMINAL IN |
| Scale Selection Method | TERMINAL |
| Movement Type | VIBRATING REED |
| Overall Diameter | 2.500 INCHES NOMINAL IN |
| Resonant Reed Quantity | 7 |
| Style Designator | ROUND FLUSH MTG |
| Mounting Hole Diameter | 0.125 INCHES NOMINAL IN |
| Mounting Bolt Circle Diameter | 2.440 INCHES NOMINAL IN |
| Material | PLASTIC |
| Frequency Response Range | +397.000 TO 403.000 HERTZ |
| 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 |
| Weight | 0.0100 lbs |
| Cube | 0.0010 cu ft |
| Part Number | Manufacturer |
|---|---|
| 291-400-07-02 PRIMARY | Phaostron Instrument and Electronic Company (USA) |
| FRAHM2993 | Avo Intl (USA) |
| Reference | Meaning |
|---|---|
| 26249-5101 | 5/9 Secondary reference U.S. Government activity |
NSN 6625-00-855-3564 is a Meter,electrical Frequency, manufactured by Phaostron Instrument and Electronic Company, classified under FSC 6625, Electrical and Electronic Properties Measuring and Testing Instruments. Status: active.
NSN 6625-00-855-3564 has 2 manufacturer part numbers on file: 291-400-07-02 (Phaostron Instrument and Electronic Company), FRAHM2993 (Avo Intl).
Key specifications for 291-400-07-02: Register Quantity: 1; Mounting Facility Type and Quantity: 3 THREADED HOLE(S); Meter Body Diameter Behind Mounting Flange: 2.156 INCHES NOMINAL IN; Mounting Arrangement Style: THREE HOLE/STUD BOLT CIRCLE. 16 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.