Bolt and nut types pdf

The size most commonly associated with screw threads is the nominal diameter. It works best for applications where very little of the bolt is exposed, or where the cap nut doesnt need to screw down fully along the length of the bolts shaft. Most commonly used in the bulk production of bolts, screws, nuts for general engineering. Bolts are typically used to hold materials or objects together, or to position objects. The outside of the fastener is a hex so it can be driven with a wrench.

A short guide to metric nuts and bolts answers to the most frequently asked questions standard and fine pitch th reads how to identify nut and bolt strength grades how nut and bolt strength grades compare maximum tightening torques why specifi ed torque is sometimes lower than the maximum spanner sizes versus bolt nut thread size. Students will also be taught how to drill a hole and tap a thread into. Failure modes of bolt and nut assemblies under tensile. The nut styles range from hexagonal heads, regular square nuts, machine screw nuts, thumb nuts, nylong insert stop, cap nuts and other style types. Chart of nut, bolt and screw types screws, bolts, nut bolt. Acorn acorn nuts are a high crown type of cap nut, used for appearance.

About 11% of these are screws, 3% are nuts, and 23% are bolts. Also known as a coach bolt, has a domed or countersunk head. It is caused by a pushing or pulling force at 90 from the axis of a part. Dec 06, 2016 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 3.

These nuts have different functions in the fastener industry. The square section under the head grips into the part being fastened preventing the bolt from turning when the nut is tightened. A cap nut is closed on one end, with a smoothlydomed top. The bolt head is usually placed in concrete before it has cured, leaving the threaded end exposed.

Nuts are almost always used in conjunction with a mating bolt to fasten multiple parts together. What is a nut a nut is a type of fastener with a threaded hole. Elevator bolts elevator bolts are often used in conveyor systems. The simplest and strongest form of anchor bolt is castinplace, with its embedded end consisting of a standard hexagonal head bolt and washer, 90bend, or some sort of forged or welded flange see also stud welding. They will learn how to measure a bolt and determine the thread type by using a thread gauge. Steel washers are usually provided under the bolt head and nuts to prevent the treaded portion of the bolt from bearing on the connecting pieces and to distribute the clamping pressure on the bolted member. Fastener type chart bolt depot nuts and bolts, screws. A short guide to metric nuts and bolts 2 thomson rail. Abbreviated hhmb or lvanized nuts and washers will fit galvanized bolts. Nylon insert jam lock a nylock nut with a reduced height. Bolt, nut, screw, rivet, and washer manufacturing 1997economiccensus manufacturing industryseries 1997 issuednovember1999 ec97m3327c u.

Standard bolt identification markings identification grade mark specification fastener description material nominal size range in. Types of nuts nut typesthis site has many useful charts illustrating fasteners and their uses. Bolts come in several configurations for their application and specification variances. We also carry a wide range of other bolts including flange screws, lag screws, plow bolts, square head bolts, step bolts, structural bolts and more. Heavy nuts are quite common and readily available in various types and sizes but heavy head bolts have more limited availability. An acorn nuts has roughly the same design as a cap nut, except that its rounded end has a higher crown. Types of nuts nut types this site has many useful charts illustrating fasteners and their uses. This method is used to tighten bolts that have diameters greater than 20 mm, as these bolts need an extremely high tightening torque. What types of screws, nuts, washers and bolts are used in a. This chart illustrates the different style nuts used in the industry. The nut is a type of a fastener which has a threaded hole in it. When this type of fastener is used, the parts will never be.

The last are used in concretesteel composite structures as shear connectors. Antivibration selflock screw and flange nut set with low neck. Glossary of fastener terms the bolt supply house ltd. Hex tap bolts, hex cap screws, trim head hex cap screws, and hex serrated flange bolts fall under this category. Basic types of selflocking fasteners chemical additive type introduction to selflocking fasteners technical introduction. Bolts in u shape for attaching to pipe or other round surfaces. 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 3. Fatigue failure analysis for boltnut connections having slight pitch differences using experimental and finite element methods xin chen1,2, naoaki noda1, magd abdel wahab2, yuichiro akaishi1, yoshikazu sano1, yasushi takase1, gusztav fekete3 1 department of mechanical engineering kyushu institute of technology, kitakyushu 8048550, japan. A bolt is a threaded fastener which is always coupled with a nut. Nuts, bolts and fasteners 228 suitable for connecting description material article no. These nutss may have different thread counts for the different types of bolts. The nut is always used in joining with a mating bolt to fasten various parts together.

Standards for dimensions and tolerances are issued. The two partners are kept together by a combination of their threads friction with slight elastic deformation, a slight stretching of the bolt, and compression of the parts to be held together. Different forms and types of nuts and bolts are as follows. Cheat guide chart bolts, screws, washers, nuts, drive charts working on a project and trying to find the name of a special bolt type. Heavy hex a heavier pattern version of a standard hex nut.

This method employs a hydraulic ram placed over the nut and a threaded puller which attaches to the ram. Acceptability of screw threads shall be determined based on ansiasme b1. Cap a nut with a domed top over the end of the fastener. The shape of the head is depended upon the purpose for which bolt is required. These heads are made in order to grip the tools that are used to tighten them. Since the terms bolt and screw were in use before the advent of easilyproduced helix. Nonthreaded metal fasteners, except aircraft types. This includes the head, length and more, however, the bolt thread is often the hardest to measure.

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. Bolts are measured in many different types of parameters. Bolt and nut types pdf a sheet metal screw with a self drilling point. We have the charts to help you identify the many different types of bolts and screws for just about any project.

The earliest bolt heads in use were the square heads. Simply knowing the head type on a screw or bolt can let you know what type of screwdriver or socket type you will need so you do not strip or cross thread your fastener. Amrine and swanson experienced only bolt fracture when they tested astm a325 bolt and nut assemblies with a varying number of threads in the grip. Types of bolts designing buildings wiki share your construction industry knowledge. Certain types are some times referred to as stove bolts. Bolts are generally have the flat head which means there is no grove on the head. A bolt is a type of fastener, usually made from metal, that commonly comprises a head at one end, a chamfer at the other, and a shaft characterised by an external helical ridge known as a thread. Bolts, nuts, hex head bolt nut, heavy hex bolt nut, fastener. A bolt is a type of threaded hardware fastener that is used to position two workpieces in specific relation to each other. Arbor bolt bolt with a washer permanently attached and reversed threading. With the help of below charts you can identify almost any type of bolt and screw different types of fasteners, head styles in fasteners, drive types in fasteners, washer types in fasteners and nut types in fasteners. Bolts as well as screws are available in a vast variety of head shapes. Similar to an eye bolt but with wood threads instead of machine thread.

Threads shall be unified inch coarse thread series unc, class 2a, for all stud bolt sizes 1 in. Nylon insert lock a nut with a nylon insert to prevent backing off. Types of bolts and their uses the nuts and bolts blog. In the type of locking, the friction between the mating threads of bolt and nut locks the nut. A flange nut is a nut that has a wide flange at one end which acts as an integrated washer that does not move or spin. The most common type of bolt head types includes square, hex, slotted hex washer and socket cap. Nut types pdf print format this chart shows the different styles of nuts used in the manufacturing industry. Shoulder bolts also known as stripper bolts are used to create a pivot point. Sep 30, 2016 with the help of below charts you can identify almost any type of bolt and screw different types of fasteners, head styles in fasteners, drive types in fasteners, washer types in fasteners and nut types in fasteners.

Anchor bolt bolt designed to allow objects to be attached to concrete. Nevertheless, to our knowledge, no publications in the literature have the purpose of investigating how the threaded length l t affects the failure mode in bolt and nut assemblies. Wood screws have large threads and a smooth shank f or pulling two pieces of material together. This type permits the parts to be readily disconnected without damaging the fastener, e. Bolt, nut, and washer identification guide hot rod an identification guide of the most common and uncommon bolt, nut, and washer types on the market. Tee a nut designed to be driven into wood to create a threaded hole. Bolt head on one end, threads on other end, used with a nut stud rod threaded at both ends cap screw head on one end, threads on other end, not used with a nut machine screw similar to cap screw but smaller set screw used to prevent 2 rotating parts from moving separately. Self locking bolt and nut set sm lsnum6x12 a4 71981 self locking bolt and nut set sm lsnum6x12 pg 72750 self locking bolt and nut set s. For this type, the parts can be disconnected, but some damage usually occurs to the fastener, e. Machine screws are fully threaded for use with a nut or in a tapped hole. A wide variety of different types of screws nuts and bolts options are available to you. Knowing the names and the specific types of screws, bolts, washers, or nuts you will need for your current or future diy project is very important. Allpro threaded neither employs nor maintains an engineering or technica l staff, and allpro is merely supplying certain.

Type description a4 a4 kg sm henum10x 72950 sm henum10x140 72951 sm henum10x150 72952 nuts, bolts and fasteners nuts, bolts and fasteners. Fully threaded hex bolts are also known as tap bolts. Full fastener products dowedo ningbo windo metal co. Anchor bolts bolt types standard bolt size hex bolts. The threaded section of the bolt should extend past the nut for this method to succeed. Identification charts for different types of fasteners. Mar 20, 2020 types of bolts designing buildings wiki share your construction industry knowledge. A coupling nut is a threaded fastener used for joining two male threads, most commonly threaded rod. Cheat guide chart bolts, screws, washers, nuts, drive. Srjc, engr45, 2012 the nuts and bolts behind engineering. A bolt comprises of a head, cylindrical body and threads along its length. Since the terms bolt and screw were in use before the advent of easilyproduced helix fasteners.

Fatigue failure analysis for boltnut connections having. Feb 22, 2018 types of bolts and their uses head shapes. Bolt is a metal pin with a head at one end and a shank threaded at other end to receive a nut, as shown in figure 6. I suggest you buy every one of them you can find craigslist, ebay, garage sales, bike shops, camping stores, marine equipment dealers and start taking them apart.