What are the different type of bolt heads?
Common bolt heads include hex, slotted hex washer, and socket cap. The first bolts had square heads, formed by forging. These are still found, although much more common today is the hexagonal head. These are held and turned by a spanner or wrench, of which there are many forms.
What is a bolt with a flat head called?
Flat Head Screws, also called Countersunk Screws, are conical with a flat outer face and a tapering inner face. These screws are commonly made out of stainless steel or zinc coating. These screws are typically used in applications where the fastener protruding above the surface is unacceptable.
What are round headed bolts called?
A carriage bolt (also called coach bolt and round-head square-neck bolt is a form of bolt used to fasten metal to metal or, more commonly, wood to metal.
Can you use a bolt without a nut?
Screws and bolts look somewhat similar, since both have threads. However, bolts can also be screwed into a threaded hole in order to fasten something down without the need for a nut, like a valve cover bolt that fastens down the valve cover to the rest of a car’s engine.
How do I know what type of bolt I have?
Fasteners are identified by four or five attributes; Type, Material, Diameter, Length, and Thread Pitch or Count (machine thread fasteners only).
What are bolts without heads called?
Set screws are most often headless (aka blind), meaning that the screw is fully threaded and has no head. A blind set screw, known in UK as a grub screw, is almost always driven with an internal wrenching drive, such as a hex Allen key.
What is a tapered screw called?
Screws with a tapered shank aren’t perfectly straight. Rather, they become narrower from the tip towards the head. This feature is known as a “tapered shank” because the shank narrows or tapers from the tip to the head.
What kind of fastening system has tapered head?
TAPER-LOK® is an interference fit fastening system with a self-sealing feature. The system includes a close tolerance tapered shank bolt and a companion washer-nut which is self-centering and self-locking. Beside this, what is a head screw? A screw will usually have a head on one end that allows it to be turned with a tool.
What kind of bolts are used for tapped holes?
Bolts with a hexagonal head with threads for use with a nut or tapped hole. Bolts with a smooth rounded head that has a small square section underneath. and pointed tip. Flange bolts have a flange on the bottom of the head that distributes the load like a washer.
How is an expander nut used in an anchor?
These anchors are often used to anchor machinery. Bolts can be removed and reused in the same hole or used in a new hole along with a replacement expander nut (sold separately). To install, thread the nut onto the tapered bolt and insert into a hole. Made from zinc-plated steel, they resist corrosion in wet environments.
What kind of screws are used for Hanger bolts?
Hanger bolts have wood thread on one end and machine thread on the other end. Machine screws with no head for screwing all the way into threaded holes. A countersunk head with a flat top.