What are smooth bolts called?
The smooth part of a fastener above the threads. Also called the shank. This is measured from the bottom of the head to the start of the transition to threads.
What is a headed bolt called?
Hex bolts, also called hexagon head bolts or hexagonal head bolts, are a very common form of bolt that is available in standard dimensional inch and metric sizes. As the name implies, these bolts feature a hexagonal head or a hex head, that is suitable for tightening with a wrench or socket.
What are different types of bolt heads?
| Head Styles | |
|---|---|
| Flat A countersunk head with a flat top. Abbreviated FH | Oval A countersunk head with a rounded top. Abbreviated OH or OV |
| Round A domed head. Abbreviated RH | Hex A hexagonal Head. Abbreviated HH or HX |
| Socket Cap A small cylindrical head using a socket drive. | Button A low profile rounded head using a socket drive. |
What are Allen bolts?
Definition of Allen bolt hardware. : a bolt with a hexagonal socket in its head that is designed to be used with an Allen wrench The Allen bolt is integral to the crank and remains in it when the crank is removed from the spindle.—
What is a round headed bolt?
Round head bolts (button head) are commonly used in wood connections. Round head bolts are similar to carriage bolts, but without the square neck under the head. Because they are used with wood, round head bolts are rarely high strength and virtually always supplied in a standard ASTM A307 specification.
Why are there different types of bolt heads?
Answer: The primary reason for the wide variety of screw head drive types is to ensure the fact that you will never have the proper screwdriver close at hand when you need it.
What is another name for Allen bolt?
A hex key, also known as an Allen key or Allen wrench, is a small handheld tool that’s used for for driving bolts and screws with a hexagonal socket. They are available in many different sizes, though they all have the same hexagonal-shaped tip. To learn more about hex keys and the benefits they offer, keep reading.
What does a coach bolt look like?
A carriage bolt generally has a round head and a flat tip, and is threaded along part of its shank. Carriage bolts are often referred to as plow bolts or coach bolts and are most commonly used in wood applications.
Why is it called a coach bolt?
There are specially designed types of bolts for these applications which are termed carriage bolts. Earlier in the 1800s, these bolts were used in the construction of carriages and their wheels. That is where they get their name.
What are T head bolts used for?
T-Head bolts are mainly used with a nut to joint an object with a T shaped slot so that the head of the bolt sits flush or below the material surrounding it. T-head bolts can come in any requested coating or plating such as zinc, black oxide, silver and many others.
What is a cheese head bolt?
Cheese Head Screws have a disc with a cylindrical outer edge, height approximately half the head diameter, and a flat bearing surface. These screws are known for their high strength, accuracy, quality, and durability.
What is the point of flat head screws?
Flat head screws are used a lot in the building industry for cabinets, countertops, stairs, furniture, drywall and other components. Flat head screws are ideal for these applications because they’re flush with surface.
Why do we still use flat head screws?
Flat head screws are good for wood as they prevent overtightening and thus help prevent stripping.
What is a screw without a point called?
Machine screws have no points and are intended to use in holes that are already tapped or with a nut. They are threaded along the entire shaft are sold in threads per inch.