PartsTable TECHNICAL DATA SHEET
NSN 6645-01-645-4289Government record, cited

Clock, Master Regulating6645-01-645-4289

NSN 6645-01-645-4289 · NIIN 016454289 · Part number NTDS46-DF
Masterclock, Inc. · FSC 6645 — Time Measuring Instruments · FSG 66 — Instruments and Laboratory Equipment · CAGE 1GZF9
Government record, cited
NSN 6645-01-645-4289 — this item is cataloged by the U.S. Government under National Stock Number 6645-01-645-4289. Manufacturer of record part number: NTDS46-DF.
Also searched as  6645-01-645-4289 · 6645016454289 · NIIN 016454289 · 01-645-4289 · FSC 6645 Time Measuring Instruments · CAGE 1GZF9 · NTDS46-DF
Nearby stock numbers  ·
Features
  • Clock,master Regulating — FSC 6645
  • Display Type: LIGHT EMITTING DIODE (L.E.D.).
  • 1 manufacturer part number on file
  • Manufacturer of record: Masterclock, Inc.
Identification
  • NSN: 6645-01-645-4289
  • NIIN: 016454289
  • FSC: 6645 — Time Measuring Instruments
  • FSG: 66 — Instruments and Laboratory Equipment
  • Primary part number: NTDS46-DF
  • Manufacturer: Masterclock, Inc.
General Description

The Clock,master Regulating, cataloged under National Stock Number 6645-01-645-4289, is classified within Federal Supply Class 6645 (Time Measuring Instruments) of the Instruments and Laboratory Equipment group. The manufacturer of record is Masterclock, Inc.. Government technical data includes 1 specification, 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. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6645-01-645-4289
Primary Part NumberNTDS46-DF
Item NameClock,master Regulating
FSC / FSG6645 / 66 — Time Measuring Instruments
ManufacturerMasterclock, Inc.
StatusACTIVE
Display TypeLIGHT EMITTING DIODE (L.E.D.).
Lifecycle & Compliance
Acquisition StatusACTIVE
DEMIL CodeDEMIL A — No Demilitarization Required
HazardNo hazard code in the DLA record (HMIC N)
Criticality CodeX
Cross-Reference Index
Part NumberManufacturer
NTDS46-DF PRIMARY Masterclock, Inc. (USA)
No interchangeability data on file.
Other items in FSC 6645 — Time Measuring Instruments
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
6645-00-001-1256
6645-00-001-1256 · Item name not on file
6645-00-001-4498
6645-00-001-4498 · Item name not on file
6645-00-001-4584
6645-00-001-4584 · Item name not on file
6645-00-001-9400
METER,TIME TOTALIZING
6645-00-003-0327
6645-00-003-0327 · Item name not on file
6645-00-003-0328
6645-00-003-0328 · Item name not on file
6645-00-003-0337
6645-00-003-0337 · Item name not on file
6645-00-003-0338
METER,TIME TOTALIZING

Frequently Asked Questions

What is NSN 6645-01-645-4289?

NSN 6645-01-645-4289 is a Clock,master Regulating, manufactured by Masterclock, Inc., classified under FSC 6645, Time Measuring Instruments. Status: active.

What part numbers are listed for NSN 6645-01-645-4289?

NSN 6645-01-645-4289 has 1 manufacturer part number on file: NTDS46-DF (Masterclock, Inc.).

What are the specifications of NTDS46-DF?

Key specifications for NTDS46-DF: Overall Height: 9.5 INCHES NOMINAL IN; Overall Width: 25.0 INCHES NOMINAL IN; Display Type: LIGHT EMITTING DIODE (L.E.D.).; Special Features: EACH FACE HAS 6 DIGITS 4 INCHES, DISPLAY COLORS AVAILABLE RED,GREEN, ANBER,BLUE AND WHITE, DISPLAY IN 12 OR 24 HR FORMAT, CHASSIS COLORS IS BLK POWDER COAT, CONNECTORS ETHERNET RJ45, DC OR IEC AC INPUT, 24VDC VDC. 1 specification is documented in the U.S. Government catalog.

Is NSN 6645-01-645-4289 hazardous material?

No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.

Sources

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.

✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.
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