Hex Bolts have hexagonal heads and are for general purpose applications with a socket type installation tool or standard wrench. The standard bolt is compatible with standard nuts and washers of the same thread pitch, grade, and finish. Grade-8 bolts have a higher strength and are to be used with Grade-8 nuts. An alternative for using Hex Bolts without nuts is to place them directly into a compatible female threaded receptacle. They require a pre drilled hole or pre-taped hole with compatible female thread. Available in various materials, grades, and finishes.
Ratchet goes both ways, it rotates. combination wrenches and box wrench are same size just box wrench box on one side.Tnut goes into wood,drill the hole inside the wood then you hammer it down.
Carriage Bolt features a smooth, rounded head with no external drive for appearance, safety and security. The square shank under the head pulls into the material as nuts are tightened and prevents the bolt from turning once completely installed. Common applications for this bolt include deck building, fence construction and outdoor furniture. They are generally pushed into a pre-drilled hole and then tightened in place with hex nuts and flat or lock washer
