Product Details | CHRONOMETER

6645-00-990-9422 An instrument for precisely determining time, manufactured to close tolerances to assure the time-keeping qualities of dependability and consistency of rate. These qualities are accurately ascertained by comparison with more exact devices or by astronomical methods so that the accumulated error may be taken into account when determining time. Its usual uses are to indicate time for navigational purposes, and to serve as a reference for less accurate timepieces. It is usually provided with a winding indicator dial and is usually mounted in gimbals to maintain the instrument in a level position. May consist of a spring driven or other type of movement which is capable of exacting performance without regulation throughout the normal range of room temperatures. Not designed for carrying on the person.

Part Alternates: 21, 6645-00-990-9422, 00-990-9422, 6645009909422, 009909422

Instruments and Laboratory Equipment | Time Measuring Instruments

Supply Group (FSG) NSN Assign. NIIN
66 01 JAN 1960 00-990-9422

Demand History | NSN 6645-00-990-9422

Part Number Request Date QTY Origin
21 2017-01-10 7 US

Cross Reference | NSN 6645-00-990-9422

Part Number Cage Code Manufacturer
21 26992 HAMILTON WATCH CO INC

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Technical Data | NSN 6645-00-990-9422

Characteristic Specifications
BACKGROUND COLOR SILVER
SCALE NAME 12 HOUR
DIAL SCALE MARKING LUMINOSITY NONLUMINOUS
LUMINOUS NUMERAL NOT INCLUDED
INSCRIPTION COLOR BLACK
HAND QUANTITY 4
HAND DESIGNATION HOUR HAND AND MINUTE HAND AND SECOND HAND AND WIND INDICATOR HAND
HAND TYPE SWEEP AND SWEEP AND ECCENTRIC AND SWEEP
HAND COLOR BLACK AND BLACK AND BLACK AND BLACK
LUMINOUS HAND NOT INCLUDED
JEWEL QUANTITY 14
MOVEMENT SIZE DESIGNATION 85
MAXIMUM RUNNING TIME 56.000 HOURS
WINDING METHOD KEY
ESCAPEMENT TYPE DETENT
CORRECT TIME RESET TYPE KEY
CASE MATERIAL BRASS
CASE SURFACE TREATMENT POLISHED
CRYSTAL TYPE GLASS
CARRYING CASE PROVIDED
TIME TYPE MEAN SOLAR
MOUNTING METHOD GIMBAL CASE
MOUNTING CASE INCLUDED
MANUFACTURERS CODE 26992
DESIGN CONTROL REFERENCE 21

Restrictions/Controls & Freight Information | NSN 6645-00-990-9422

Category Code Description
Hazardous Material Indicator CodeNThere is no data in the HMIS and the NSN is in an FSC not generally suspected of containing hazardous materials
Demilitarization Code:ANon-Munitions List Item/ Non-Strategic List Item - Demilitarization not required.
Precious Metals Indicator Code:UPrecious metal type is unknown
Criticality Code:X The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.
Category Code Description
No Freight Information