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		                        | National Stock Number:
 3820-00-431-9872
 
 Federal Supply Class:
 3820
 
 National Item Identification Number:
 004319872
 
 Description:
 BIT,ROTARY WELL DRILLING
 
 Detail:
 A DETACHABLE, END CUTTING, DRILLING TOOL WITH ONE END THREADED FOR ATTACHING TO A WELL DRILLING TOOL ADAPTER OR DRILLING PIPE. THE OPPOSITE END IS DESIGNED TO PENETRATE THE EARTH WHEN USED IN A ROTARY TYPE WELL DRILLING MACHINE.
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 Manufacturer Information:
 
 | 29-250 | 66155 | PORTA DRILL INC | 
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 Techincal Specification:
 
 | DRILL CAPACITY HOLE DIAMETER | 7.875 INCHES NOMINAL |  | CUTTING EDGE TYPE | ROLLER |  | ROLLER QUANTITY | 3 | 
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