PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

400245Case,clock,aircraft

Waltham Aircraft Clock Corp · NSN 6645-01-273-1097 · FSC 6645 · No Item Name Available
Verified by PartsTable
NSN 6645-01-273-1097 — this item is cataloged by the U.S. Government under National Stock Number 6645-01-273-1097. Primary manufacturer part number: 400245.
Features
  • Case,clock,aircraft — 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 Case,clock,aircraft, cataloged under National Stock Number 6645-01-273-1097, 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. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6645-01-273-1097
Primary Part Number400245
Item NameCase,clock,aircraft
FSC / FSG6645 / 66 — No Item Name Available
ManufacturerWaltham Aircraft Clock Corp
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
5306-00-167-3865 INTERCHANGEABLE
Bolt,machine
3030-00-801-2097225532R1 INTERCHANGEABLE
Belt,v
Navistar Intl Corp Truck Br Ohio Plant
6695-01-442-9807 INTERCHANGEABLE
Panel,indicator
5325-01-481-13314002-45 INTERCHANGEABLE
Stud Assembly,turnlock Fastener
Howmet Global Fastening Systems Inc Div Camloc Products
5995-01-692-9738400245 INTERCHANGEABLE
Cable Assembly,special Purpose,e
Pathfinder Digital Llc
Cross-Reference Index
Part NumberManufacturer
400245 PRIMARY Waltham Aircraft Clock Corp (USA)
400245 Waltham Clock Co Inc (USA)
Related Parts
5306-00-167-3865INTERCHANGEABLE
BOLT,MACHINE
3030-00-801-2097INTERCHANGEABLE
BELT,V
225532R1
6695-01-442-9807INTERCHANGEABLE
PANEL,INDICATOR
5325-01-481-1331INTERCHANGEABLE
STUD ASSEMBLY,TURNLOCK FASTENER
4002-45
5995-01-692-9738INTERCHANGEABLE
CABLE ASSEMBLY,SPECIAL PURPOSE,E
400245

Frequently Asked Questions

What is NSN 6645-01-273-1097?

NSN 6645-01-273-1097 is a Case,clock,aircraft, manufactured by Waltham Aircraft Clock Corp, classified under FSC 6645 (No Item Name Available). Status: active.

What are the part numbers for NSN 6645-01-273-1097?

NSN 6645-01-273-1097 has 2 cross-referenced part numbers: 400245 (Waltham Aircraft Clock Corp), 400245 (Waltham Clock Co Inc).

What NSN replaces 6645-01-273-1097?

There are 5 known substitutes for 6645-01-273-1097: 5306-00-167-3865, 3030-00-801-2097, 6695-01-442-9807 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 400245?

Key specifications for 400245: End Item Identification: MECHANICAL AIRCRAFT CLOCK,ABU-11A A. 1 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com