PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

15677Clockcase Assy

The Chelsea Clock Llc · NSN 6645-00-343-8249 · FSC 6645 · No Item Name Available
Verified by PartsTable
NSN 6645-00-343-8249 — this item is cataloged by the U.S. Government under National Stock Number 6645-00-343-8249. Primary manufacturer part number: 15677.
Features
  • Clockcase Assy — FSC 6645
  • 3 verified cross-references
  • Primary manufacturer: The Chelsea Clock Llc
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Clockcase Assy, cataloged under National Stock Number 6645-00-343-8249, is classified within Federal Supply Class 6645 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is The Chelsea Clock Llc. This item has 3 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameClockcase Assy
FSC / FSG6645 — No Item Name Available (FSG 66)
ManufacturersThe Chelsea Clock Llc (CAGE 11755)
Technical Specifications
ParameterValue
NSN6645-00-343-8249
Primary Part Number15677
Item NameClockcase Assy
FSC / FSG6645 / 66 — No Item Name Available
ManufacturerThe Chelsea Clock Llc
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
5330-00-112-0121 INTERCHANGEABLE
Seal,plain Encased
5950-00-248-6921SCC60715 INTERCHANGEABLE
Transformer,power
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
2940-00-497-6794AF493 INTERCHANGEABLE
Filter Element,intake Air Cleane
Cummins Filtration Inc Dba Fleetguard Div Cummins Inc
5325-00-795-9884A547042 INTERCHANGEABLE
Ring,retaining
Westinghouse Air Brake Technologies Corp Dba Westinghouse Air Brake Technologies Corp
4820-01-126-007215677 INTERCHANGEABLE
Valve,safety Relief
Tyco Fire Products Lp
1005-01-260-2639 INTERCHANGEABLE
Spring,magazine
8145-01-265-366215677 INTERCHANGEABLE
Shipping and Storage Container,e
Naval Inventory Control Point
5305-01-273-832915677 INTERCHANGEABLE
Screw,cap,socket Head
Sps Technologies, Llc Dba PB Fasteners
1095-01-364-030715677 INTERCHANGEABLE
Holster,pistol
Bianchi International Dba Bae Systems Products Group
Cross-Reference Index
Part NumberManufacturer
51357AND14062AND6910 The Chelsea Clock Llc (USA)
15677 PRIMARY The Chelsea Clock Llc (USA)
51357AND14062ANDH18CHC010037 The Chelsea Clock Llc (USA)
Related Parts
5330-00-112-0121INTERCHANGEABLE
SEAL,PLAIN ENCASED
5950-00-248-6921INTERCHANGEABLE
TRANSFORMER,POWER
SCC60715
2940-00-497-6794INTERCHANGEABLE
FILTER ELEMENT,INTAKE AIR CLEANE
AF493
5325-00-795-9884INTERCHANGEABLE
RING,RETAINING
A547042
4820-01-126-0072INTERCHANGEABLE
VALVE,SAFETY RELIEF
15677
1005-01-260-2639INTERCHANGEABLE
SPRING,MAGAZINE
8145-01-265-3662INTERCHANGEABLE
SHIPPING AND STORAGE CONTAINER,E
15677
5305-01-273-8329INTERCHANGEABLE
SCREW,CAP,SOCKET HEAD
15677
1095-01-364-0307INTERCHANGEABLE
HOLSTER,PISTOL
15677

Frequently Asked Questions

What is NSN 6645-00-343-8249?

NSN 6645-00-343-8249 is a Clockcase Assy, manufactured by The Chelsea Clock Llc, classified under FSC 6645 (No Item Name Available). Status: active.

What are the part numbers for NSN 6645-00-343-8249?

NSN 6645-00-343-8249 has 3 cross-referenced part numbers: 51357AND14062AND6910 (The Chelsea Clock Llc), 15677 (The Chelsea Clock Llc), 51357AND14062ANDH18CHC010037 (The Chelsea Clock Llc).

What NSN replaces 6645-00-343-8249?

There are 9 known substitutes for 6645-00-343-8249: 5330-00-112-0121, 5950-00-248-6921, 2940-00-497-6794 and 6 more. Verify interchangeability with system specifications before substitution.

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