What are Nuts and Bolts & Types With Images

A nut is a little metal part with a hole in the center surrounded by spirally cut grooves known as threads. Nuts are basically hexagonal in shape, which makes them easy to grip from all sides.

They are utilized as fasteners for mating bolts and are held together by the frictional substitution of their threads. Nuts come in a variety of types, like hex, coupler, cap, wing, turnbuckle, and lock.

What Are Nuts?

A Nuts are mechanical fasteners that are utilized in conjunction with bolts to secure two or more parts jointly. They are basically made of metal and have a female thread on the inside, which enables them to be tightened into a bolt with a matching male thread.

Nuts arrive in a different variety of shapes and sizes to fit different types of bolts. Like, hex nuts have a hexagonal shape and are tightened using a wrench, but wing nuts have wing like overhangs that can be tightened by hand.

Several types of nuts are designed to be more secure than others. Lock nuts, for example, have a mechanism that assists to prevent them from coming loose, like a nylon insert or a series of ridges on the threads. These nuts are often utilized in applications where it is important to prevent parts from arriving loose, like in the construction of bridges or other structures.

Nuts are typically made of steel, but they can also be made of other materials like brass, aluminum, or even plastic. The material utilize depends on the specific application and the needs of the fastener, like its strength, corrosion resistance, and the type of bolt it will be utilized with.

Nuts are in stock in a variety of shapes, sizes, materials, and thread patterns. While your choice of a nut is somewhat constrained by your selection of bolt, particularly in terms of size and threading, select the nut head shape and material that is most acceptable for your application.

Types Of Nuts

These are different types of nuts: castle nuts, coupling nuts, cap nuts, flange serrated nuts, hex finish nuts, hex jam nuts, hex machine nuts, heavy hex nuts, hex machine nuts small pattern, nylon hex jam nuts, nylon insert lock nuts, knurled thumb nuts, prevailing torque lock nuts, slotted hex nuts, square nuts, t-nuts, break away or shear nuts, tri-groove nuts, structural heavy hex nuts, wing nut.

Cap Nuts

The cap nut, also recognized as the acorn nut, derives its name from its shape. The nut features a domed top to avoid contact with the outer thread.

Castle Nuts

Utilize with cotter pins to prevent loosening, a castellated nut, also referred to as a castle or slotted nut, is not with slots cut into the top. Typically employed low-torque applications such as holding a wheel bearing in place.

Coupling Nuts

A coupling nut is a threaded fastener utilized for connecting two male threads, most threaded rods. The exterior of the fastener allows it to be driven with a wrench.

Hex Finish Nuts

Hex finish nuts are utilized for fastening to a hex cap screw, socket cap screw, or bolt. The prevailing nuts, hex finish nuts are hex-shaped with internal threads and are manipulated with a wrench.

Heavy Hex Nuts

Bigger, weightier, and thicker than a standard hex nut. heavy hex nuts possess a hexagonal shape, are internally threaded, and are driven with a wrench. Often utilized with hex cap screws and carriage bolts.

Hex Machine Nuts Small Pattern

A machine nut is hexagonal in shape with internal threads. It is smaller than a hex jam or hex finish nut and is designed for use with machine screws under 1/4″ in diameter.

Flange Serrated Nuts

A flange nut is characterized by a wide flange at one end which acts as an integrated washer that does not move or spin. The serrated flange is designed to distribute the pressure of the nut over the part being secured and create a locking action to deter loosening.

Hex Machine Nuts

A machine nut is hexagonal in shape with internal threads. Comparatively smaller than a hex jam or hex finish nut, they are utilized with machine screws under 1/4″ in diameter.

Hex Jam Nuts

A jam nut is commonly employed when a nut needs to be locked in place without clamping to another object. Hex jam nuts are hexagonal in shape with internal threads, but they are thinner than hexagonal finish nuts.

Wing Nuts

Wing nuts are threaded nuts with wings on each side of the body enabling manual turning and installation. Easy hand assembly and utilize when the nut requires to be removed often.

Structural Heavy Hex Nuts

Structural hex nuts are comparable to finish nuts but are manufactured to be thicker and much stronger. They are basically utilized in steel-to-steel structural connections.

Nylon Insert Lock Nuts

A nylon insert lock nut is hex-shaped and personally threaded with a nylon insert. The nylon material blocks loosening from vibration and cross threads to pause the nut from backing off of the fastener.

Keps-K Lock Nuts

he keps nut, a k-nut or a washer nut, a keps-k lock nut has a connected free-spinning lock washer. Keps nuts are drafted to make assembly more user-friendly      

Nylon Hex Jam Nuts

A low-profile lock nut is hex-shaped and inside threaded with a nylon install. The nylon material blocks loosening from vibration and cross threads to pause the nut from backing off of the fastener.

Slotted Hex Nuts

Slotted hex nuts are nuts with portions cut out drafted to be utilized with a cotter ping to create a locking system. These nuts are parallel to a castle nut but have a lower profile which sometimes produces them a better option.

Tri-Groove Nuts

Tri-groove security nuts have a tapered diameter making them hard to grip with grabbing components like a adjustable wrenches or pliers. These nuts need a special original gripping device to setup them making them more secure than a typical nut.     

T-Nuts

A t-nut or tee nut is utilized to fasten wood, particles, or composite board leaving a flush surface. A long thin body with a flange at one end resembles closely a T in profile. T-nuts regularly have 3 or 4 prongs that sink into the surface offering better retention.

Knurled Thumb Nuts

A knurled head thumb nut or thumb nut has a knurled outside shell rather than a hex, which facilitates compressing by hand. Regularly used in decorative finishes or applications.

Prevailing Torque Lock Nuts

Basically known as stover nuts, prevailing torque lock nuts have angled corners and a conical top. The deformation in the top thread resists loosening from vibration. Also, known as one-way nuts, they can only be set up one way and are commonly used in high-temperature applications because they are all metal with no nylon introduced.

Break Away Or Shear Nuts

They are drafted with an intentional flaw to snap the hexagonal head off once the maximum torque has arrived. Leaving back a safe cone nut that cannot be easily removed.

Square Nuts

A four-sided nut that may be flat or angled on top. Square nuts offer a greater surface contact area which offers more resistance to loosening. mated with square head bolts.

Bolts

A bolt is a long piece of metal with a rounded shank for a body that is threaded in a helical style. The bolt body has a head at one end that enables it to be twisted into an object or nut.

Bolts come in different types of length sizes while nuts are standard sizes. Bolts are exposed to tensile forces, and it is the tensile stress that factors them to fail.

The main difference between a nut and a bolt is that a nut is a little metal object with a hole in the center surrounded by threads meanwhile a bolt is a long piece of metal with a curved shank that threads the body in a spiral shape. Nuts are utilized as fasteners for mating bolts, but bolts are used to hold things together

What Are Bolts?

Bolts are a category of mechanical fasteners utilized to hold two or more objects Jointly. They are basically manufactured of steel or other strong metals and are cylindrical in shape with a head on one end and a screw thread on the other end.

The head of the bolt is utilized to apply torque to the bolt, enabling it to be tightened or loosened as required. The screw thread is utilized to mate with a matching nut or threaded hole, which assists hold items securely in place.

There are many different types of bolt drafting for specific applications. Such as hex bolts have a hex head that can be tightened or loosened with a wrench. Carriage bolts have a round head with a square neck below, which prevents the bolt from turning when tightened.

Bolts are used in a variety of programs including construction, automotive, and manufacturing. Often utilized to grasp together heavy machinery, buildings, and different structures, Some bolts are also coated with a guarding varnish to prevent corrosion and extend their life.

They basically require a drilled hole and a complementary nut, or tapped mating part for setup, and, unlike screws, they are basically not tapered. The terminology notable between the types of bolts is often inconsistent and incorrectly utilized interchangeably for screws, so it is best to choose your bolts based on your project specifications rather than the exact name shown on a supplier’s homepage.

Bolts are one of the primary versatile structural fasteners, accessible in a vast array of configurations to suit different materials and strengths needed. These fasteners differ first in thread specification, length, and head shape, with varying connections of these characteristics resulting in bolts with various functions.

Types of bolts

Different types of bolts we will understand one by one:

1-Carriage Bolts

Carriage Bolts are a form of self-locking bolt that allows a level of security by utilizing a flush-mount domed head, which permits to reduce or loosening of these bolts from the nut side of the bolt only.

Beneath the domed head of the carriage bolt is a square unit that can be inserted into a matching square cut that is slotted in the material started joined to provide the self-locking feature that enables the bolt to be tightened from the nut side without a required to restrain the head with a wrench.

2-Hexagonal Bolts

Hexagonal bolts are a very common form of bolt that is accessible in standard dimensional inch and metric sizes. As the name suggests, these bolts feature a hexagonal head or a hex head, that is proper for tightening with a wrench or socket.

A hexagonal bolt may be fully threaded or may feature an unthreaded upper arm. Hexagonal bolts are often utilized to fasten wood to wood, metal to wood, or metal to metal. Hexagonal nuts and washers are basically used with hex bolts, the washers being valuable for conditions where the material started joined is softer and may deform under the tightening force applied to the hex bolt.

Hexagonal bolts are sometimes referred to as hex cap screws when they utilize a washer face underneath the head and feature a sloped end.

T-Head Bolts

T-head bolts or T-slot bolts feature a head drafting that allows it to be inserted into a slot or recess, thereby ensuring the bolt in place to stop it from turning when the securing nut is tightened.

T-bolts are utilized in applications like securing fuel tanks in a place where having an approach to both sides of the fastener may not be achievable in all cases. The T-slot collection of T-head bolts can be fed into a channel in a machine named a T-slot track and may be utilized to secure an object at any situation along the length of the channel.

Socket Head Bolts

Socket head bolts feature an inset head that is tightened utilizing an Allen wrench or hex socket tool. The head design of these bolts can vary from a cylindrical profile to a flat-head tapered style to a domed button head design, contingent upon on the desired use.

The deeper recessed Allen socket head allows the ability to increase the torque applied to these fasteners while minimizing the safety of stripping or damaging the head. Socket head bolts are often mentioned to as socket head cap screws, subject to on the supplier.

Round Head Bolts

Comparable in appearance to carriage bolts, round-head bolts do not have the square gradually narrow beneath the domed head of the bolt and are basically used to join wood. The softer quality of wood permits the bolt to compress opposing the surface of the wood and grip by friction to prevent the bolt from turning when the nut is tightened.

Penta-Head Bolts

Penta-head bolts are an instance of a tamper-resistant bolt, which may be utilized in applications where it is desired to down the likelihood that a person armed with quality tools can loosen or remove the bolt.

With the head of the bolt in the shape of a pentagon, a quality wrench or socket set will be incapable of being utilized on these bolts.

Machine Screws

A machine screw is a screw. Available in a collection of drive types and heads, they fit a wide collection of applications. Regularly driven into tapped holes. Utilized with nuts and washers.

Lag Bolts

lag screws are some of the most difficult fasteners. These greatly sturdy fasteners are basically utilized to connect heavy lumber or other heavy materials that are started an intense load.

These screws differ from basic wood, self-drilling, or sheet metal screws. Contrasted to most ordinary screws, lag screws are huge in size. Most lag screws are at the bare minimum one inch long and ¼-inch thick.

Shoulder Bolts

Shoulder bolts, also named stripper bolts, feature a threaded bolt part of a smaller diameter than the shoulder of the bolt
shoulder bolts are beneficial for functioning as a shaft or axle that can hold a rotating part, like a bearing or a bushing.

Double-End Bolts

Double-end bolts are every so often called stud bolts and feature a threaded portion on every end of the bolt without a traditional head. One end is drafted to be threaded into an acceptable hole that has been tapped with a mated thread, but the other end sticks out and is threaded to assist a nut.

The manifestation is similar to that of a threaded rod but is conventionally not threaded over the entire length of the stud and may be threaded distinctively on every end. use a screw thread on one end instead of bolt threads on both ends.

Flange Bolts

Flange bolts contain a washer-like surface or flange beneath the head of these fasteners that supply a means to distribute the clamping load over a great surface area, thereby reducing potential damage to the surface with which these fasteners will mate.


Flange bolts are often utilized in applications like plumbing and automotive. Flange bolts are regularly manufactured from steel or stainless steel and are available in good and coarse threads and a variety of grades.

U-Bolts

The U-bolts are fasteners that are in the design of the letter U, which contain two male threads, one on every end of the bolt on which a fitting plate bracket and joint nuts are placed. But most U-bolts feature a semi-circular profile, some have a squared-off design.

These fasteners are basically not fully threaded, as they work to clamp an object in place. They are utilized in a range of applications from helping pipe to automotive utilize on drive shafts and exhaust systems. Some drafts include rubber coating to preclude wear from the motion of metal against metal.

Locking Nut

The locking nut is an essential component in different mechanical and automotive applications drafted to prevent the undesired loosening of threaded joints. Its innovative drafting features a specialized mechanism that enhances stability and security.

What is locking nut?

A lock nut also named a locking nut is a type of nut that resists slackening under vibration and torque. It is an inside threaded fastener that has locking capacities.

Normal nuts pass on a clamping force to a bolt or screw to stop axial movement. However, if the application Includes vibration, there is a hazard that the nuts will loosen and the application will be broken.

Types of locking nut

There are two types of locking nut:

1- Friction lock nut

2- Positive lock nut

1-The friction lock nuts demand more torque to both tighten and loosen, Particularly during the initial free rotation before they start to clamp the part. It means they can not be spun suddenly along a long length of filament, basically increasing the hand-operated assembly time for the application.

2-The positive locking nuts are smooth to rotate for both tightening and loosening, they only lock when positive movement is taken to lock them in their current direction, like Inserting a pin. This can enable both faster assembly and more secure attachment.

Difference Between Nuts and Bolts:

We will discuss step by step basic difference of nuts and bolts

Nuts

  • A nut is a type of fastener that are consistently used with bolts.
  • The nuts are hollow rounded cylinders with a rounded cross-section.
  • They are utilized as a fastener in conjugation with bolts.
  • The material used to manufacture is basically carbon steel coated with zinc.
  • They are not thinking ahead
  • The nut experiences compressive force on it and basically fails because of compressive stresses.

Bolts

  • The bolt is a strong cylindrical fastener that is utilized with a nut.
  • In conjugation with nuts are utilized to fasten the stuff.
  • They are solid cylinders with a circular cross-section.
  • The material basically utilized to manufacture high grade steel with a big percentage of nickel and chrome.
  • The bolts are led to tighten and loosen.
  • They experience tensile forces on it and fail because of tensile Street

Difference Between In Metric and Imperial Bolts

Some basic point explained

  • The primary distinction between metric and imperial bolts lies in their respective measurement standards. The metric bolt’s head is measured in mm but the imperial is measured in inches.
  • Metric bolts use the metric system of measurement, even if they are drafted in the USA. You can find markings on the head of the metric bolts that show how strong the bolt is and called its tensile strength.
  • You will find the size of bolts primarily comes from the USA. Two prevalent variations of standard bolts are present in the Unified National Fine (UNF) thread and Coarse (UNC) thread standards. You will not ordinarily find numeric markings on the head. will see the line on the heads. To discover the strength of an imperial bolt you have to measure the number of threads.

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Conclusion

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