The Meter,time Totalizing, cataloged under National Stock Number 6645-01-261-0056, is classified within Federal Supply Class 6645 (Time Measuring Instruments) of the Instruments and Laboratory Equipment group. The manufacturer of record is Tyco Electronics Crompton Instrument. Government technical data includes 5 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6645-01-261-0056 |
| Primary Part Number | 549-156A-PNC6-ZH |
| Item Name | Meter,time Totalizing |
| FSC / FSG | 6645 / 66 — Time Measuring Instruments |
| Manufacturer | Tyco Electronics Crompton Instrument |
| Status | ACTIVE |
| Movement Type | ELECTRICAL |
| Current Type | AC |
| Operating Frequency | 60.0 HERTZ NOMINAL |
| Voltage Rating | 120.0 VOLTS NOMINAL |
| Measurement Unit | HOURS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 549-15-6A-PNZH | Tyco Electronics Crompton Instrument (USA) |
| 549-156A-PNC6-ZH PRIMARY | Tyco Electronics Crompton Instrument (USA) |
| 549-156A-PNC6-ZH | Spectrum Industries, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 549-15 | 5/9 Secondary reference Tyco Electronics Crompton Instrument |
| 549-15-6A-PNVH | 5/9 Secondary reference Tyco Electronics Crompton Instrument |
NSN 6645-01-261-0056 is a Meter,time Totalizing, manufactured by Tyco Electronics Crompton Instrument, classified under FSC 6645, Time Measuring Instruments. Status: active.
NSN 6645-01-261-0056 has 3 manufacturer part numbers on file: 549-15-6A-PNZH (Tyco Electronics Crompton Instrument), 549-156A-PNC6-ZH (Tyco Electronics Crompton Instrument), 549-156A-PNC6-ZH (Spectrum Industries, Inc.).
3 possible matches (shared part number, not a government interchangeability claim): 4710-01-297-9151, 4240-01-398-4943, 6680-01-707-2731. Verify interchangeability with system specifications before substitution.
Key specifications for 549-156A-PNC6-ZH: Movement Type: ELECTRICAL; Current Type: AC; Operating Frequency: 60.0 HERTZ NOMINAL; Voltage Rating: 120.0 VOLTS NOMINAL. 5 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). 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.