Clock, Master Regulating6645-01-686-1358

NSN 6645-01-686-1358 · NIIN 016861358 · Part number NTDS46-AC

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

Government record, cited

NSN 6645-01-686-1358 — this item is cataloged by the U.S. Government under National Stock Number 6645-01-686-1358. Manufacturer of record part number: NTDS46-AC.

Also searched as 6645-01-686-1358 · 6645016861358 · NIIN 016861358 · 01-686-1358 · FSC 6645 Time Measuring Instruments · CAGE 1GZF9 · NTDS46-AC

Nearby stock numbers ← 6645-01-686-0394 Clock, Wall · 6645-01-686-1361 Clock, Master Regulating →

Features

Clock,master Regulating — FSC 6645
Current Type: AC
Mounting Method: WALL
Timer Type: ELECTRICAL
Operation Method: ELECTRONIC OPERATED
1 manufacturer part number on file
Manufacturer of record: Masterclock, Inc.

Identification

NSN: 6645-01-686-1358
NIIN: 016861358
FSC: 6645 — Time Measuring Instruments
FSG: 66 — Instruments and Laboratory Equipment
Primary part number: NTDS46-AC
Manufacturer: Masterclock, Inc.

General Description

The Clock,master Regulating, cataloged under National Stock Number 6645-01-686-1358, 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 4 specifications, 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

Parameter	Value
NSN	6645-01-686-1358
Primary Part Number	NTDS46-AC
Item Name	Clock,master Regulating
FSC / FSG	6645 / 66 — Time Measuring Instruments
Manufacturer	Masterclock, Inc.
Status	ACTIVE
Current Type	AC
Mounting Method	WALL
Timer Type	ELECTRICAL
Operation Method	ELECTRONIC OPERATED

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
NTDS46-AC 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 6645-01-686-1358?

NSN 6645-01-686-1358 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 6645-01-686-1358?

NSN 6645-01-686-1358 has 1 manufacturer part number on file: NTDS46-AC (Masterclock, Inc.).

What are the specifications of NTDS46-AC?

Key specifications for NTDS46-AC: Current Type: AC; Mounting Method: WALL; Timer Type: ELECTRICAL; Part Name Assigned by Controlling Agency: NTDS DIGITAL CLOCK. 4 specifications are documented in the U.S. Government catalog.

Is NSN 6645-01-686-1358 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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