National Item Identification Number
00-863-6927
008636927
5133-00-863-6927
5133008636927
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)
00784
00784
Reference Numbers (Part Numbers)
AT488-9
AT488C-9
Required Categories
MATERIAL
HARDNESS RATING
CUTTING END STYLE
SHANK STYLE
SHANK DIAMETER
NOMIN
Required Description
STEEL OVERALL
NOT RATED
22 INTERCHANGEABLE PILOT
76 STRAIGHT ROUND
0.250 INC