PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

400176Case,aircraft Clock

Waltham Clock Co Inc · NSN 6645-01-266-6699 · FSC 6645 · No Item Name Available
Verified by PartsTable
NSN 6645-01-266-6699 — this item is cataloged by the U.S. Government under National Stock Number 6645-01-266-6699. Primary manufacturer part number: 400176.
Features
  • Case,aircraft Clock — FSC 6645
  • 1 verified cross-reference
  • Primary manufacturer: Waltham Clock Co Inc
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Case,aircraft Clock, cataloged under National Stock Number 6645-01-266-6699, is classified within Federal Supply Class 6645 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Waltham Clock Co Inc. This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameCase,aircraft Clock
FSC / FSG6645 — No Item Name Available (FSG 66)
ManufacturersWaltham Clock Co Inc (CAGE 79300)
Technical Specifications
ParameterValue
NSN6645-01-266-6699
Primary Part Number400176
Item NameCase,aircraft Clock
FSC / FSG6645 / 66 — No Item Name Available
ManufacturerWaltham Clock Co Inc
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
5935-00-185-7250 INTERCHANGEABLE
Connector,plug,electrical
5998-00-411-0420 INTERCHANGEABLE
Circuit Card Assembly
5315-01-207-1350400176 INTERCHANGEABLE
Pin
Esco Corporation
6130-01-296-5021819040-0176-5 INTERCHANGEABLE
Power Supply
Pesa Inc.
5330-01-325-1478400176 INTERCHANGEABLE
Rubber Round Section
Minor Rubber Co Inc
5310-01-343-3590MS15795-855 INTERCHANGEABLE
Washer,flat
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5985-01-433-4739ATT-0291-06-024-02 INTERCHANGEABLE
Attenuator,fixed
Cinch Connectivity Solutions Inc
Cross-Reference Index
Part NumberManufacturer
400176 Waltham Clock Co Inc (USA)
Related Parts
5935-00-185-7250INTERCHANGEABLE
CONNECTOR,PLUG,ELECTRICAL
5998-00-411-0420INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
5315-01-207-1350INTERCHANGEABLE
PIN
400176
6130-01-296-5021INTERCHANGEABLE
POWER SUPPLY
819040-0176-5
5330-01-325-1478INTERCHANGEABLE
RUBBER ROUND SECTION
400176
5310-01-343-3590INTERCHANGEABLE
WASHER,FLAT
MS15795-855
5985-01-433-4739INTERCHANGEABLE
ATTENUATOR,FIXED
ATT-0291-06-024-02

Frequently Asked Questions

What is NSN 6645-01-266-6699?

NSN 6645-01-266-6699 is a Case,aircraft Clock, manufactured by Waltham Clock Co Inc, classified under FSC 6645 (No Item Name Available). Status: active.

What are the part numbers for NSN 6645-01-266-6699?

NSN 6645-01-266-6699 has 1 cross-referenced part number: 400176 (Waltham Clock Co Inc).

What NSN replaces 6645-01-266-6699?

There are 7 known substitutes for 6645-01-266-6699: 5935-00-185-7250, 5998-00-411-0420, 5315-01-207-1350 and 4 more. Verify interchangeability with system specifications before substitution.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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