PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

745Wheel

The Chelsea Clock Llc · NSN 6645-00-163-0738 · FSC 6645 · No Item Name Available
Verified by PartsTable
NSN 6645-00-163-0738 — this item is cataloged by the U.S. Government under National Stock Number 6645-00-163-0738. Primary manufacturer part number: 745.
Features
  • Wheel — FSC 6645
  • General Characteristics Item Description: BRASS; 0.688 IN. NOM DIA IN
  • 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 Wheel, cataloged under National Stock Number 6645-00-163-0738, 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. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6645-00-163-0738
Primary Part Number745
Item NameWheel
FSC / FSG6645 / 66 — No Item Name Available
ManufacturerThe Chelsea Clock Llc
StatusACTIVE
General Characteristics Item DescriptionBRASS; 0.688 IN. NOM DIA IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
3030-00-073-3598178490 INTERCHANGEABLE
Belt,v
Cummins Inc.
3110-00-100-0680745 INTERCHANGEABLE
Cone and Rollers,tapered Roller
The Timken Corporation
5930-00-133-5386745 INTERCHANGEABLE
Switch,toggle
Perko Inc
7510-00-286-576414259 INTERCHANGEABLE
Pencil
Dixon Ticonderoga Co
5110-00-449-73185110-00-449-7318 INTERCHANGEABLE
Punch,cutting,gasket
General Services Administration Federal Supply Service
4730-00-511-167711-110-000039 INTERCHANGEABLE
Coupling,pipe
Brinkley Technology Group Llc Dba Hercules Manufacturing
5310-00-599-5917 INTERCHANGEABLE
Washer,flat
5120-00-696-47685120-00-696-4768 INTERCHANGEABLE
Key Set,socket Head Screw
General Services Administration Federal Supply Service
4730-00-833-802910374-2 INTERCHANGEABLE
Trap,steam
Velan Valve Corp.
3020-00-887-85357-72 INTERCHANGEABLE
Pulley,groove
Motorola Automotive Electronics
Cross-Reference Index
Part NumberManufacturer
745 PRIMARY The Chelsea Clock Llc (USA)
46-2CHC0 Naval Observatory (USA)
37-1C91-20 Naval Observatory (USA)
Related Parts
3030-00-073-3598INTERCHANGEABLE
BELT,V
178490
3110-00-100-0680INTERCHANGEABLE
CONE AND ROLLERS,TAPERED ROLLER
745
5930-00-133-5386INTERCHANGEABLE
SWITCH,TOGGLE
745
7510-00-286-5764INTERCHANGEABLE
PENCIL
14259
5110-00-449-7318INTERCHANGEABLE
PUNCH,CUTTING,GASKET
5110-00-449-7318
4730-00-511-1677INTERCHANGEABLE
COUPLING,PIPE
11-110-000039
5310-00-599-5917INTERCHANGEABLE
WASHER,FLAT
5120-00-696-4768INTERCHANGEABLE
KEY SET,SOCKET HEAD SCREW
5120-00-696-4768
4730-00-833-8029INTERCHANGEABLE
TRAP,STEAM
10374-2
3020-00-887-8535INTERCHANGEABLE
PULLEY,GROOVE
7-72
5310-01-019-2060INTERCHANGEABLE
WASHER,SPECIAL
745
6625-01-267-4440INTERCHANGEABLE
OHMMETER
746

Frequently Asked Questions

What is NSN 6645-00-163-0738?

NSN 6645-00-163-0738 is a Wheel, manufactured by The Chelsea Clock Llc, classified under FSC 6645 (No Item Name Available). Status: active.

What are the part numbers for NSN 6645-00-163-0738?

NSN 6645-00-163-0738 has 3 cross-referenced part numbers: 745 (The Chelsea Clock Llc), 46-2CHC0 (Naval Observatory), 37-1C91-20 (Naval Observatory).

What NSN replaces 6645-00-163-0738?

There are 12 known substitutes for 6645-00-163-0738: 3030-00-073-3598, 3110-00-100-0680, 5930-00-133-5386 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 745?

Key specifications for 745: General Characteristics Item Description: BRASS; 0.688 IN. NOM DIA IN. 1 total characteristics are documented in the Federal Logistics Information System.

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