A bolt is a type of fastener with an external helical thread that mates with a complementary internal thread, often found in nuts. Bolts are commonly used to hold objects together or position objects. There are different types of bolts including carriage bolts, eye bolts, hex bolts, and lag bolts. A nut is a fastener with an internal threaded hole that works with a mating bolt to fasten multiple parts together. Nuts come in varieties such as castle nuts, acorn nuts, hex nuts, and wing nuts.

2. What is a bolt
A screw, or bolt, is a type of fastener characterized
by a helical ridge, known as an external thread or just
thread, wrapped around a cylinder. Some screw
threads are designed to mate with a complementary
thread, known as an internal thread, often in the form
of a nut or an object that has the internal thread
formed into it. Other screw threads are designed to
cut a helical groove in a softer material as the screw is
inserted. The most common uses of screws are to hold
objects together and to position objects.

3. Types of Bolts
Carriage bolt Eye bolt hex bolt Lag bolt machine bolt
Flat topped machine Oval sheet metal bolt Self drilling sheet metal bolt Flat top socket bolt Round slotted wood screw
Screw (slotted)

4. What is a nut
A nut is a type of fastener with a threaded hole. Nuts are almost always
used opposite a mating bolt to fasten a stack of parts together. The two
partners are kept together by a combination of their threads' friction, a
slight stretch of the bolt, and compression of the parts. In applications
where vibration or rotation may work a nut loose, various locking
mechanisms may be employed: Adhesives, safety pins or lockwire, nylon
inserts, or slightly oval-shaped threads

5. Types of nuts
Castle nut Acorn nut Hex jam nut hex jam nylock nut hex nut
K nut Hex nylock nut Square nut Wing nut Flange nut

6. Bibliography
www.wikipedia.com
www.boltdepot.com
.

7. Bibliography
www.wikipedia.com
www.boltdepot.com
.