We are using the power of our platform to aid in the mass shortage of critical supplies. Material of construction of bolt is subject matters to the application, condition or services. Indented hexagon washer: Same as an indented hexagon, but with the addition of a washer section at the base to protect the assembly finishfrom the wrench. A bolt contains two parts a shank and head. A washer provided with a rectangular projection is called the tab washer. Locking of the nut is done by a set screw screwed through the nearest face of the workpiece. Like lag screws, carriage bolts … With the head of the bolt in the shape of a pentagon, standard wrench or socket sets will be incapable of being used on these bolts. This recess is made of square shape so that the bolt is prevented from turning when the nut is screwed on or off. For more information on related products, consult our other guides or visit the Thomas Supplier Discovery Platform to locate potential sources of supply or view details on specific products. Types of Bolts and Their Uses Head Shapes. COVID-19 Response Additionally, they often need retightening when located in awkward places. A carriage bolt is shown in the figure. Hex tap bolts, hex cap screws, trim head hex cap screws, and hex serrated flange bolts fall under this category. Bolts are a form of mechanical fastener that is designed with external threads and paired with a nut which is intended to be inserted through holes and use to join parts together using tightening torque. A crude way of differentiating a screw and a bolt is to state that a threaded fastener with a nut and a flat bottom is a bolt and one without is a screw. Additional bolt types: The other bolt types that we can custom manufacture include anchor, belt (e.g., eye, hook, J, and U), countersunk, lag, and T-handle bolts. A single coiled spring washer will be sufficient for light classes of work. So the hook bolt is used for attaching shaft hangers to the flanges of joists and girders. A simple example of this is with the common toggle bolt that is used to secure items to a wall at a location between the supporting beams. Chicago bolts, barrel nuts or sex bolts are all names for the same uniquely-shaped type of bolt. Non-metallic designs are also available for use in applications where there is a risk of the U-bolt making contact with an electrically powered conductor. Stove bolt; Carriage bolt; Hook Bolt; Expansion bolt; Foundation or rag bolt; Eye-bolt; Stud ; Forms of Nut. Now the upper nut is held by a spanner While the lower nut is pull in the opposite direction. The neck of this bolt is usually square in section to prevent rotation of the bolt A T-bolt is shown in the figure. The simplest method of locking a nut using a split pin is shown in the figure. Sex bolt or Chicago Bolt 4. The principal types of bolts commonly used include: Anchor Bolts; Blind Bolts; Carriage Bolts; Double End Bolts; Eye Bolts; Hex Bolts; Machine Bolts; Penta-Head Bolts; Round Head Bolts; Shoulder Bolts; Socket Head Bolts; T-Head Bolts; U-Bolts; Bolts are produced to a series of standards that assure uniformity in the dimensional characteristics and materials. He is also an author and editor at theengineerspost.com. Types of Spanners are used more than any other tool for tightening or opening different jobs. Shoulder bolts are useful for functioning as a shaft or axle that can contain a rotating part, such as a bearing or a bushing. Here types of screws and bolts. Help create a pivot or attachment point. A nut may be locked by a screw pin, screwed in the bearing surface adjoining the nut touching one of the lateral faces of the nuts as shown Fig. They have a head with a recessed shape or design on one end and a shaft which leads to a point on the other. These bolts are available in various designs, which suitably fit into almost every industry requirement. Theoretically, the lower nut which is a lock nut may be the thin nut as shown fig. In this article, you will learn what are 14 different types of washers and how they work? is used in semi-permanent fastening in concrete. The nut-end is threaded for a length slightly more than the thickness of a nut or nuts to be used. Nuts are usually in the form of hexagonal or square prisms. Double end bolts are sometimes called stud bolts and feature a threaded portion on each end of the bolt without a traditional head. Stud bolt 18. and their uses with pictures. It has no head like a bolt. The empirical proportions of the lock plate are shown in the figure. The cylindrical portion of the bolt is known as the shank. The eye-bolt, shown in Fig. The head style of these bolts can vary from a cylindrical profile to a flat-head countersunk style to a domed button head design, depending on the desired use. Wood screws have many different types of heads, but the most common are round heads and flat heads. Different forms and types of nuts and bolts are as follows: Some of the most commonly used bolts are illustrated below: This is the most common form of a bolt and is used for general fasting purposes. A bolt is a form of threaded fastener with an external male thread requiring a matching pre-formed female thread such as a nut. Special Purpose Bolts. Square head bolt 17. They share a hexagonal head and are driven with a … This makes the lower nut to act as a lock nut. Penta-head bolts are an example of a tamper-resistant bolt, which may be used in applications where it is desired to reduce the likelihood that a person armed with standard tools can loosen or remove the bolt. When specifying standard bolts, the dimensional parameters should be designated per the tables of standards established by ANSI/ASME. The rotation of the bolt is prevented by means of a pin inserted into the shank just below the head. With the use of tools like wrench, these bolts are easily removed orattached.Holding down bolts: These bolts are available in three categories such as rods, cagebolts and plate bolts. ico-arrow-default-right. Initially, the nut is tightened and then the lock plate is inserted through the nut. Bolts as well as screws are … such cases sometimes two nuts of equal thickness are used as shown in Fig. Bolts used in steel structures are of three types: 1) Black Bolts 2) Turned and Fitted Bolts and 3) High Strength Friction Grip (HSFG) Bolts. Cap nuts commonly used in smoke-boxes locomotives. You can... Spanners and It's Types Anchor bolts are bolts that are designed to be used to attach a structural member or component to a concrete slab or poured foundation. Sex bolts or Chicago bolts. Since the nut is held tight within the grooves of the lock plate, the nut is prevented from slackening. He completed his engineering studies in 2014 and is currently working in a large firm as Mechanical Engineer. This method of locking of nut or bolt head is suitable when the nut or bolt head is placed near the vertical edge of the workpiece. 2. Following are some most common types of bolts 1. Similar in appearance to carriage bolts, round head bolts do not have the square taper beneath the domed head of the bolt and are typically used to join wood. We've summarized several of the types of bolts in this video: The principal types of bolts commonly used include: Bolts are produced to a series of standards that assure uniformity in the dimensional characteristics and materials. Hexagon (trimmed): Standard type of head, with clean corners that … This type of locking is employed in heavy engineering work, as in the case of connecting rods, wheel shaft etc. This is used for fastening wooden parts together or for fastening metal parts to wood it has squared portion directly under the head to prevent rotating when the nut is tightened or slackened. This article presented a brief summary of some of the common types of bolts. Bolts of ISO class 8.8 and the slightly stronger class 9.8 roughly correspond to an SAE Grade 5 bolt. To prevent this, some means of locking the nut from unscrewing is necessary. Anchor bolts may be preset into place while the concrete structure is being cast, as with the plate used on top of the poured foundation of a house. If you like “types of nuts and bolts” article please share with your friends. These are generally made of... © Copyright 2021 TheEngineersPost.com - All Rights Reserved, List of 20 Different Types of Nuts and Bolts, Shaper machine types, parts, operations and more, Cams and Followers: How they Work? Stay up to date on industry news and trends, product announcements and the latest innovations. It is threaded for a length at least equal to the diameter of the stud. is used for fixing into the stone concrete foundation, the head is wider at the bottom than at the top, and is led into a tapered hole. T-head bolt 20. This is shown in Fig. These are commonly used for paper binding. This virtually makes the upper nut to take up all to load, While the lower nut to function simply as a washer since there will not be any contact between the threads of the bolt and the lower nut. Electric motors and medium and lightweight machinery are equipped with one or more eye-bolt so that they may be readily lifted and moved by an overhead crane. Different types of head include: 1. Finding the right type of screw head for your project when there are hundreds of combinations of the drive type and head shape can be confusing, especially for beginning DIYers.It’s important to understand the differences between the shapes and drive types, not only so that you can find the right tools for your screws, but also so that you can ensure that your screwhead does everything you need for your project.First, let’s focus o… 3. U-Bolt 2. This nut can be easily operated by the thumb and a finger and is used where it is required to be adjusted frequently. After the nut is tightened the tab and the projecting portion of the washer itself are bent to bear against the vertical surface of the workpiece and one of the lateral faces of the nut or, the bolt head. [Confessions of an Industry Millennial], Nominal size in fraction or decimal equivalent. They have a broad smooth … All Rights Reserved. When the vibrations are high either a double coiled or triple coiled spring washer is used. J bolt 7. Where great strength is required, four parallel bars or keys are used in addition. When a nut is tightened over the bolt, a small working clearance exists between the threads of a nut and bolt even in the highest class of fits. The end of the bolt hole is counterbored to receive the cylindrical lower grooved portion of the nut as shown in the figure. A wing nut is shown in the figure. But as it required a special thin spanner to turn it, in practice it is more usual to place taking nut below the lock nut as shown in Fig. Typically used to fasten fire hydrants, so they will break away when hit by a car. consist of a plain piece of cylindrical steel which is screwed at both ends. Rock bolt 5. Abbrevi- ated HHMB or HXBT. The shape of the head is depended upon the purpose for which bolt is required. The nut is always used in joining with a mating bolt to fasten various parts together. This bolt is used when projecting are undesirable and where better appearance is required. A ring nut is shown in the figure. T-bolts are used in applications such as securing fuel tanks in place where having access to both sides of the fastener may not be possible in all cases. The stud is used in place of a bolt when a bolt. Unlike other bolts, which have threading along the outside of a cylindrical shaft, the Chicago bolt has a hollow shaft that is smooth on the outside and threaded along its … Bolts are very closely related to screws. Thomasnet Is A Registered Trademark Of Thomas Publishing Toggle bolt The tables are provided with T-slots to accommodate the T-heads. A hexagonal nut is shown in Fig. Some designs include rubber coating to preclude wear from the movement of metal against metal. These types of rivets are enabled with a threaded end, to which a … Elevator Bolts Elevator bolts are often used in conveyor systems. They are typically available in both hex head and square head options. While most U-bolts feature a semi-circular profile, some have a squared-off shape. The other end called the metal end. 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