🔍 Key Concepts

• Relationship between bolt diameter and the size of the hex head across flats • Standard American National (USS/SAE) wrench and bolt size tables • Difference between the bolt size (shank diameter) and the wrench (across‑flats) opening

💭 Think About

• Is the size marked on a bolt (3/4 inch here) referring to the diameter of the shank or the width across the flats of the hex head? • When you pick a wrench for a bolt, do you match the wrench size to the bolt diameter or to the distance across the flats of the hex head? • Think about whether a 3/4 inch wrench opening would realistically fit over a 3/4 inch hex head, or if some clearance and larger size is normally required.

✅ Before You Answer

• Confirm that bolt size ≠ wrench size for standard hex bolts; the wrench must fit across flats, not shank diameter. • Look up or recall the standard across‑flats dimension for a 3/4 inch American National hex head bolt and match that to the nearest wrench size in the choices. • Eliminate any answer choices that clearly could not physically fit over a 3/4 inch hex head when thinking about real tools.