What does the hole for male masonry fasteners (except concrete screws) need to equal?

The correct choice indicates that the hole for male masonry fasteners, excluding concrete screws, must equal the anchor diameter. This requirement ensures that the fastener fits snugly within the hole, which is essential for providing the necessary strength and stability when the anchor is installed. A properly sized hole allows the fastener to engage the surrounding material effectively, reducing the risk of pullout or failure under load.

Using the anchor diameter ensures that the fastener is secured at the proper depth and alignment, which contributes to the overall integrity of the installation. If the hole is undersized or oversized, it could result in inadequate hold or misalignment, compromising the fastener's performance and potentially leading to structural issues. Ensuring that the hole diameter matches the anchor diameter is a fundamental principle in masonry fastening applications that promotes reliability and effectiveness in various construction and repair scenarios.