Understanding Counterbore Dimensioning

GD&T of a counterbored slot - Eng-Tips counterbore slot callout A: Dimensioning a counterbore involves specifying its diameter and depth, along with the dimensions of the smaller pilot hole beneath it These counterbore slot Counterbored hole dimensions for US socket head cap screws Counterbore dia Counterbore depth Countersink dia Clearance dia

hotel slot Use this chart to find out what size counterbore hole to use for your ANSI Inch socket cap head screws and bolts