RS PRO Counterbore M10, 100 mm x 18mm Cut Diameter, 1 Piece - 131993

Drill Bit Type = Counterbore
Thread Size = M10mm
Cutter Diameter = 18mm
Cutter Length = 22mm
Shank Type = Plain
Number of Pieces = 1
Shank Diameter = 12.5 mm
Overall Length = 100 mm
Material = HSS

HSS Individual Counterbores. Counterbores for cutting holes where a capscrew or fastener is required to sit flush or even below the level of the workpiece. Thread size is the size of the screw thread to sit within the hole and cutting diameter shows the size that will be cut for both the capscrew and head.