PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

BA51A45A1-1Clock,panel

The Boeing Company · NSN 6645-00-950-8599 · FSC 6645 · No Item Name Available
Verified by PartsTable
NSN 6645-00-950-8599 — this item is cataloged by the U.S. Government under National Stock Number 6645-00-950-8599. Primary manufacturer part number: BA51A45A1-1.
Features
  • Clock,panel — FSC 6645
  • Movement Type: MECHANICAL
  • 24 verified cross-references
  • Primary manufacturer: The Boeing Company
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Clock,panel, cataloged under National Stock Number 6645-00-950-8599, 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 Boeing Company. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 24 commercial cross-references from 14 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN6645-00-950-8599
Primary Part NumberBA51A45A1-1
Item NameClock,panel
FSC / FSG6645 / 66 — No Item Name Available
ManufacturerThe Boeing Company
StatusCANCELLED
Movement TypeMECHANICAL
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
4920-00-004-9807704409-1 INTERCHANGEABLE
Adapter,gearhead
Ge Aviation Systems Llc
6645-00-084-1424 INTERCHANGEABLE
Clock,panel
5935-00-129-307510315 INTERCHANGEABLE
Socket,plug-in Electronic Compon
Electro Switch Corp. Dba Oak Grisgsby Div Electroswitch
6645-00-150-6526400202 INTERCHANGEABLE
Clock,panel
Waltham Aircraft Clock Corp
6610-00-185-94332154 INTERCHANGEABLE
Plate and Shaft
Mission Systems Davenport Inc.
6645-00-225-26784080A INTERCHANGEABLE
Wheel,minute Record
Wakmann Watch Company Inc
6625-00-324-0572P6006 INTERCHANGEABLE
Lead,test
Tektronix, Inc.
4730-00-476-97152154 INTERCHANGEABLE
Tee-Y,drainage Pipe
Plastic & Steel Supply Co., Inc. Dba Plastic Engineered Products
6350-00-500-22771002-02 INTERCHANGEABLE
Annunciator
U.s. Pioneer, L.l.c.
5999-00-519-4802L680020-1 INTERCHANGEABLE
Delay Line
Raytheon Company Dba Raytheon Co
Cross-Reference Index
Part NumberManufacturer
BA51A45A1-1 The Boeing Company (USA)
2232SET12 Van Norman Machine Co Inc Sub of Winvan Inc (USA)
2154 Elgin National Industries Inc (USA)
AN5743T1A Aeronautical Standards Group Dept of Navy and Air Force (USA)
2012273-01 Raytheon Technical Services Company (USA)
400201 Waltham Clock Co Inc (USA)
4080A Wakmann Watch Company Inc (USA)
A13A1 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MILC6499 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
10515514 Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate (USA)
MILC6499ATYPEA13A Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
22322SET12 Waltham Clock Co Inc (USA)
BUA884SK Northrop Grumman Systems Corporation (USA)
AN5743T1A Curtiss-Wright Controls, Inc. Div Actuation Division (USA)
400164 Waltham Clock Co Inc (USA)
2012273-01 Cae Usa Inc. (USA)
1050-225 Aeronautical Standards Group Dept of Navy and Air Force (USA)
100202 Raytheon Technical Services Company (USA)
400191 Waltham Clock Co Inc (USA)
400201 Waltham Aircraft Clock Corp (USA)
Related Parts
4920-00-004-9807INTERCHANGEABLE
ADAPTER,GEARHEAD
704409-1
6645-00-084-1424INTERCHANGEABLE
CLOCK,PANEL
5935-00-129-3075INTERCHANGEABLE
SOCKET,PLUG-IN ELECTRONIC COMPON
10315
6645-00-150-6526INTERCHANGEABLE
CLOCK,PANEL
400202
6610-00-185-9433INTERCHANGEABLE
PLATE AND SHAFT
2154
6645-00-225-2678INTERCHANGEABLE
WHEEL,MINUTE RECORD
4080A
6625-00-324-0572INTERCHANGEABLE
LEAD,TEST
P6006
4730-00-476-9715INTERCHANGEABLE
TEE-Y,DRAINAGE PIPE
2154
6350-00-500-2277INTERCHANGEABLE
ANNUNCIATOR
1002-02
5999-00-519-4802INTERCHANGEABLE
DELAY LINE
L680020-1
6515-00-532-8384INTERCHANGEABLE
SYRINGE,HYPODERMIC
2134
5310-00-582-5977INTERCHANGEABLE
WASHER,FLAT
120394

Frequently Asked Questions

What is NSN 6645-00-950-8599?

NSN 6645-00-950-8599 is a Clock,panel, manufactured by The Boeing Company, classified under FSC 6645 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 6645-00-950-8599?

NSN 6645-00-950-8599 has 24 cross-referenced part numbers: BA51A45A1-1 (The Boeing Company), 2232SET12 (Van Norman Machine Co Inc Sub of Winvan Inc), 2154 (Elgin National Industries Inc), AN5743T1A (Aeronautical Standards Group Dept of Navy and Air Force), 2012273-01 (Raytheon Technical Services Company) and 19 more.

What NSN replaces 6645-00-950-8599?

There are 12 known substitutes for 6645-00-950-8599: 4920-00-004-9807, 6645-00-084-1424, 5935-00-129-3075 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of BA51A45A1-1?

Key specifications for BA51A45A1-1: Special Features: SCALE QUANTITY 2; SCALE NAME ELAPSED TIME; SCALE RANGE 0.0 TO 12.0 HOUR AND 0.0 TO 60.0 MINUTE; GRADUATION UNIT 1.0 HOUR; MAJOR GRADUATION COLOR YELLOW,FLUORESCENT OR YELLOW,FLUORESCENT; MINOR GRADUATION COLOR YELLOW,FLUORESCENT; HAND QUANTITY 2; KNOB TYPE SETTING AND WINDING AND ELAPSED TIME CONTROL; KNOB LOCATION LOWER LEFT HAND SIDE AND UPPER RIGHT HAND CORNER; MOUNTING HOLE QUANTITY 2; MOUNTING HOLE DIAMETER 0.170 IN.; MOUNTING HOLE LOCATION UPPER LEFT HAND CORNER AND LOWER RIGHT HAND CORNER 0.928 IN. FROM CENTER LINES IN; Movement Type: MECHANICAL; Overall Width: 2.375 INCHES NOMINAL IN; Overall Height: 2.375 INCHES NOMINAL IN. 4 total characteristics are documented in the Federal Logistics Information System.

Is NSN 6645-00-950-8599 still in active supply?

NSN 6645-00-950-8599 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

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