National Item Identification Number

01-217-8262
012178262
5133-01-217-8262
5133012178262

National Stock Number

Item Name

COUNTERBORE,MACHINE

Federal Supply Class

5133

Description

An end cutting tool having two or more cutting edges with flutes or grooves for the passage of cuttings, an integral or removable holder designed for adaption to the end of a machine spindle. The flutes or grooves are usually helical to give a positive rake at the cutting edges. It is designed to form a flat-bottomed enlargement of the mouth of a previously formed cylindrical hole. For items requiring a holder but the holder is not included, use CUTTER, COUNTERBORE.

Commercial and Government Entity Code (Supplier Data)

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83324

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63005

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Reference Numbers (Part Numbers)

RC-C21-201
23008734

Required Categories

Required Description