Carriage Bolts have a square shoulder under a rounded head which resists turning when the nut is tightened. Carriage bolts are good for wood-to-wood connections when the head may not be accessible for tightening. Hot dipped galvanized or stainless steel carriage bolts are used for outdoor projects like the construction of docks, decks or outdoor furniture.
Flange Bolts are a hex head cap screw with a built-in flat washer under the head. The one piece construction allows for quick install without the need of a flat washer.
Flat Socket Head Cap Screws have a Flat Countersunk head that accepts an allen wrench with a machine thread to install into a tapped hole or to be used with a nut.
Hanger Bolts have a machine thread on one end and a wood thread on the other end. Hanger Bolts are used to lag into wood and to fasten and object onto the other end with a nut
Hex Head Cap Screws can be referred to as hex bolts. These are the most common hex bolts for assembly purposes. Hex Head Cap Screws have a hex head made to tighen with a wrench or a socket and a machine thread that accepts a nut.
J-Bolts can have a round bend, sharp bend, or a L-Bend to the hook. L-Bend Anchor Bolts are cast into concrete and a Round Bend or Sharp Bend J-Bolt hooks onto a metal bar to lock into place. They all have machine threads that will accept a nut.
Shoulder Bolts are also known as stripper bolts . They have a cylindrical head with a smooth shoulder(shank) under the head. The thread is one size smaller then the diameter of the shoulder and very short in length. When determining the size of shoulder bolts. The dimenions given are the diameter and length of the shoulder.
Socket Head Cap Screws have a cylindrical head that accepts an allen wrench with a machine thread to install into a tapped hole or to be used with a nut.
Structural Bolts are a heavy hex head cap screw. The heavy hex allows for greater torque and holder power than a convential hex head cap screw. Structural bolts are general found in structural steel connections. Often referred to as A325 or A490 Bolts
Tap Bolts are fully threaded hex head cap screws. Tap bolts can be used as an adjustment pin, puller, or a good bolt to use when the length of the material is unsure.
