Grizzly H2947 - 4 pc. HSS Socket Cap Screw Counterbores
H2947 4-Piece HSS Socket Cap Screw Counterbores
The ultimate in a 3-flute high-speed steel counter bore sets.
The H2947 4-Piece HSS Socket Cap Screw Counterbores are designed to create a recess for socket head cap and shoulder screws.
The pilots are precision ground to clearance hole dimensions which are clearly marked on the shanks.
The shanks are ground to fractional inch dimensions so they can be secured in collets as well as drill chucks.
Counter bores are sized for the heads of #10, 1/4", 5/16", and 3/8" cap screws.
HSS (high-speed steel) has been heat treated for hardness and wear resistance, which keeps a sharp edge longer than other carbon steels.
The Grizzly Customer Service and Technical Support Teams are U.S. based.
- Material: High-speed steel
- Sizes: #10, 1/4", 5/16", 3/8"