PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

NST-2Timer,stop

Franklin Instrument Company, Inc. Div Franklin Instrument Co · NSN 6645-00-521-0353 · FSC 6645 · No Item Name Available
Verified by PartsTable
NSN 6645-00-521-0353 — this item is cataloged by the U.S. Government under National Stock Number 6645-00-521-0353. Primary manufacturer part number: NST-2.
Features
  • Timer,stop — FSC 6645
  • Dial Size: 3.250 IN. DIA DIAL IN
  • Color: GREEN, DARK
  • Mounting Method: PORTABLE CASE
  • Surface Treatment: ENAMEL CASE
  • Luminous Numeral: NOT INCLUDED
  • Hand Color: RED AND BLACK
  • Fast Hand Speed: 1 RPM RPM
Applications
  • Applications requiring Steel Case construction
General Description

The Timer,stop, cataloged under National Stock Number 6645-00-521-0353, is classified within Federal Supply Class 6645 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Franklin Instrument Company, Inc. Div Franklin Instrument Co. Government technical data includes 16 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 7 commercial cross-references from 6 manufacturers, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN6645-00-521-0353
Primary Part NumberNST-2
Item NameTimer,stop
FSC / FSG6645 / 66 — No Item Name Available
ManufacturerFranklin Instrument Company, Inc. Div Franklin Instrument Co
StatusCANCELLED
Dial Size3.250 IN. DIA DIAL IN
ColorGREEN, DARK
Mounting MethodPORTABLE CASE
Surface TreatmentENAMEL CASE
Luminous NumeralNOT INCLUDED
Hand ColorRED AND BLACK
Fast Hand Speed1 RPM RPM
Timer TypeMECHANICAL
MaterialSTEEL CASE
Inscription ColorBLACK
Time Indicator Total Capacity60 MIN
Dial Background ColorWHITE
Hand Designation and Quantity1 MINUTE HAND AND 1 SECOND HAND
Illuminated FeatureNOT INCLUDED
Luminous HandNOT INCLUDED
Dial Minimum Graduation1 SEC
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 7
5331-00-167-5138 INTERCHANGEABLE
O-Ring
5950-00-578-051810178108-24 INTERCHANGEABLE
Coil,radio Frequency
Us Army Aviation and Missile Command
5355-01-073-9258 INTERCHANGEABLE
Knob
5930-01-285-672214656 INTERCHANGEABLE
Switch Assembly
Giga-Tronics Incorporated Dba Giga-Tronics
5950-01-321-80241002175-1 INTERCHANGEABLE
Reactor
Raytheon Company Dba Raytheon
2520-01-325-813314656 INTERCHANGEABLE
Drive Shaft Assembly,constant Ve
Liftking Manufacturing Corp
6105-01-725-585714656-1 INTERCHANGEABLE
Cover,electric Motor
Gatr Technologies, Inc.
Cross-Reference Index
Part NumberManufacturer
NST-2 Franklin Instrument Company, Inc. Div Franklin Instrument Co (USA)
TI070003 Marathon Watch Company Ltd (CAN)
8169702 Us Army Aviation and Missile Command (USA)
12810-10 Curtin Matheson Scientific Inc (USA)
69225 Precision Scientific Petroleum Instruments Co (USA)
209-8970-103 Marathon Watch Company Ltd (CAN)
14-656 Fisher Scientific Company L.l.c. (USA)
Related Parts
5331-00-167-5138INTERCHANGEABLE
O-RING
5950-00-578-0518INTERCHANGEABLE
COIL,RADIO FREQUENCY
10178108-24
5355-01-073-9258INTERCHANGEABLE
KNOB
5930-01-285-6722INTERCHANGEABLE
SWITCH ASSEMBLY
14656
5950-01-321-8024INTERCHANGEABLE
REACTOR
1002175-1
2520-01-325-8133INTERCHANGEABLE
DRIVE SHAFT ASSEMBLY,CONSTANT VE
14656
6105-01-725-5857INTERCHANGEABLE
COVER,ELECTRIC MOTOR
14656-1

Frequently Asked Questions

What is NSN 6645-00-521-0353?

NSN 6645-00-521-0353 is a Timer,stop, manufactured by Franklin Instrument Company, Inc. Div Franklin Instrument Co, classified under FSC 6645 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 6645-00-521-0353?

NSN 6645-00-521-0353 has 7 cross-referenced part numbers: NST-2 (Franklin Instrument Company, Inc. Div Franklin Instrument Co), TI070003 (Marathon Watch Company Ltd), 8169702 (Us Army Aviation and Missile Command), 12810-10 (Curtin Matheson Scientific Inc), 69225 (Precision Scientific Petroleum Instruments Co) and 2 more.

What NSN replaces 6645-00-521-0353?

There are 7 known substitutes for 6645-00-521-0353: 5331-00-167-5138, 5950-00-578-0518, 5355-01-073-9258 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of NST-2?

Key specifications for NST-2: Dial Size: 3.250 IN. DIA DIAL IN; Color: GREEN, DARK; Mounting Method: PORTABLE CASE; Surface Treatment: ENAMEL CASE. 19 total characteristics are documented in the Federal Logistics Information System.

Is NSN 6645-00-521-0353 still in active supply?

NSN 6645-00-521-0353 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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