Clock, Master Regulating6645-01-641-4998

NSN 6645-01-641-4998 · NIIN 016414998 · Part number NTDS24

Masterclock, Inc. · FSC 6645 — Time Measuring Instruments · FSG 66 — Instruments and Laboratory Equipment · CAGE 1GZF9

Government record, cited

NSN 6645-01-641-4998 — this item is cataloged by the U.S. Government under National Stock Number 6645-01-641-4998. Manufacturer of record part number: NTDS24.

Also searched as 6645-01-641-4998 · 6645016414998 · NIIN 016414998 · 01-641-4998 · FSC 6645 Time Measuring Instruments · CAGE 1GZF9 · NTDS24

Nearby stock numbers ← 6645-01-641-1575 Generator, Time Code · 6645-01-641-6391 Clock, Master Regulating →

Features

Clock,master Regulating — FSC 6645
1 manufacturer part number on file
Manufacturer of record: Masterclock, Inc.

Identification

NSN: 6645-01-641-4998
NIIN: 016414998
FSC: 6645 — Time Measuring Instruments
FSG: 66 — Instruments and Laboratory Equipment
Primary part number: NTDS24
Manufacturer: Masterclock, Inc.

General Description

The Clock,master Regulating, cataloged under National Stock Number 6645-01-641-4998, is classified within Federal Supply Class 6645 (Time Measuring Instruments) of the Instruments and Laboratory Equipment group. The manufacturer of record is Masterclock, Inc.. 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

Parameter	Value
NSN	6645-01-641-4998
Primary Part Number	NTDS24
Item Name	Clock,master Regulating
FSC / FSG	6645 / 66 — Time Measuring Instruments
Manufacturer	Masterclock, Inc.
Status	ACTIVE

Lifecycle & Compliance

Acquisition Status	ACTIVE
DEMIL Code	DEMIL A — No Demilitarization Required
Hazard	No hazard code in the DLA record (HMIC N)
Criticality Code	X

Cross-Reference Index

Part Number	Manufacturer
NTDS24 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 6645-01-641-4998?

NSN 6645-01-641-4998 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 6645-01-641-4998?

NSN 6645-01-641-4998 has 1 manufacturer part number on file: NTDS24 (Masterclock, Inc.).

What are the specifications of NTDS24?

Key specifications for NTDS24: Special Features: GLOBAL SATELLITE VOICE AND DATA COMMUNICATIONS W/ COMPLETE GLOBAL COVERAGE INCLUDING POLAR-REGIONS; Part Name Assigned by Controlling Agency: IRIDIUM PILOT, BROADBAND SUBSCRIBER UNIT. 0 specifications are documented in the U.S. Government catalog.

Is NSN 6645-01-641-4998 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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