How do you find the counterbore hole?

Counterbore Hole Dimensions Chart Calculator for recommended clearance and hole dimensions for socket head cap screws from #0 through 2 inches size….COUNTERBORE HOLE DIMENSIONS CHART CALCULATOR.

INPUT PARAMETERS
Nominal Screw Size	#0 #1 #2 #3 #4 #5 #6 #8 #10 1/4 5/16 3/8 7/16 1/2 5/8 3/4 7/8 1 1 1/4 1 1/2 1 3/4 2
Fit Class1,2	Normal Close

What is a counter bore screw?

Counterbore screws are threaded fasteners that are designed for use in counterbored holes. A counterbored hole is essentially a pilot hole consisting of a long and narrow threaded channel at the bottom and a shallower but wider channel at the top.

What is the difference between a counterbore hole and a countersink hole?

The difference between them is the angle at which the larger hole is drilled. A countersink’s larger hole is tapered at an angle; whereas a counterbore is drilled straight into the material and leaves a flat bottom between the counterbore and the narrower inner shaft.

Is a counterbore considered a hole?

A counterbore (symbol: ⌴) is a cylindrical flat-bottomed hole that enlarges another coaxial hole, or the tool used to create that feature.

What is a counter bore used for?

A counterbore is used to enlarge the opening of a hole producing a flat bottom so a socket-head screw will fit flush with the surface of the part. Lock washers may be used to ensure a secure assembly. Typically counterbores are used for a single purpose. Countersinks have a greater range of applications and angles.

How do you call a counterbore hole on a drawing?

Click the edge of a hole, then click in the graphics area to place the hole callout. and the dimension of the depth. If the hole is created in the Hole Wizard, the callout contains additional information (the dimensions of a countersink or number of hole instances, for example).