PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

200921Dial

Waltham Aircraft Clock Corp · NSN 6645-01-283-1476 · FSC 6645 · No Item Name Available
Verified by PartsTable
NSN 6645-01-283-1476 — this item is cataloged by the U.S. Government under National Stock Number 6645-01-283-1476. Primary manufacturer part number: 200921.
Features
  • Dial — FSC 6645
  • 2 verified cross-references
  • Primary manufacturer: Waltham Aircraft Clock Corp
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Dial, cataloged under National Stock Number 6645-01-283-1476, 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 Aircraft Clock Corp. This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameDial
FSC / FSG6645 — No Item Name Available (FSG 66)
ManufacturersWaltham Aircraft Clock Corp (CAGE 0Y4A4); Waltham Clock Co Inc (CAGE 79300)
Technical Specifications
ParameterValue
NSN6645-01-283-1476
Primary Part Number200921
Item NameDial
FSC / FSG6645 / 66 — No Item Name Available
ManufacturerWaltham Aircraft Clock Corp
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
5985-00-288-5980 INTERCHANGEABLE
Waveguide Assembly
5360-00-562-9857200921 INTERCHANGEABLE
Spring,helical,extension
Products Support, Llc Dba Vitesse Systems - Jessup, Md
5935-01-271-5839372-2331-610 INTERCHANGEABLE
Connector,receptacle,electrical
Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems
2330-01-474-93922000303 INTERCHANGEABLE
Trailer,low Bed
Hdt Expeditionary Systems Inc
Cross-Reference Index
Part NumberManufacturer
200921 PRIMARY Waltham Aircraft Clock Corp (USA)
200921 Waltham Clock Co Inc (USA)
Related Parts
5985-00-288-5980INTERCHANGEABLE
WAVEGUIDE ASSEMBLY
5360-00-562-9857INTERCHANGEABLE
SPRING,HELICAL,EXTENSION
200921
5935-01-271-5839INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
372-2331-610
2330-01-474-9392INTERCHANGEABLE
TRAILER,LOW BED
2000303

Frequently Asked Questions

What is NSN 6645-01-283-1476?

NSN 6645-01-283-1476 is a Dial, manufactured by Waltham Aircraft Clock Corp, classified under FSC 6645 (No Item Name Available). Status: active.

What are the part numbers for NSN 6645-01-283-1476?

NSN 6645-01-283-1476 has 2 cross-referenced part numbers: 200921 (Waltham Aircraft Clock Corp), 200921 (Waltham Clock Co Inc).

What NSN replaces 6645-01-283-1476?

There are 4 known substitutes for 6645-01-283-1476: 5985-00-288-5980, 5360-00-562-9857, 5935-01-271-5839 and 1 more. Verify interchangeability with system specifications before substitution.

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