National Item Identification Number

01-046-5928
010465928
5133-01-046-5928
5133010465928

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)

---

08295

---

MARTIN AIRCRAFT TOOL COMPANY INC
18381 MT LANGLEY ST
8097
FOUNTAIN VALLEY
CA
92708
714-962-6641

---

Reference Numbers (Part Numbers)

MM-275-21

Required Categories

Required Description