Bolt and nut types pdf

Acorn acorn nuts are a high crown type of cap nut, used for appearance. Fully threaded hex bolts are also known as tap bolts. 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. 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. A cap nut is closed on one end, with a smoothlydomed top. Types of bolts designing buildings wiki share your construction industry knowledge. Since the terms bolt and screw were in use before the advent of easilyproduced helix. 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. 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. It is caused by a pushing or pulling force at 90 from the axis of a part. Most commonly used in the bulk production of bolts, screws, nuts for general engineering.

The bolt head is usually placed in concrete before it has cured, leaving the threaded end exposed. Different forms and types of nuts and bolts are as follows. 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. 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. 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.

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. Cap a nut with a domed top over the end of the fastener. A wide variety of different types of screws nuts and bolts options are available to you. Nylon insert lock a nut with a nylon insert to prevent backing off. Glossary of fastener terms the bolt supply house ltd. In the type of locking, the friction between the mating threads of bolt and nut locks the nut. Bolts in u shape for attaching to pipe or other round surfaces. This includes the head, length and more, however, the bolt thread is often the hardest to measure. Hex tap bolts, hex cap screws, trim head hex cap screws, and hex serrated flange bolts fall under this category. Standards for dimensions and tolerances are issued.

These heads are made in order to grip the tools that are used to tighten them. Bolt and nut types pdf a sheet metal screw with a self drilling point. 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. Shoulder bolts also known as stripper bolts are used to create a pivot point. Arbor bolt bolt with a washer permanently attached and reversed threading.

Basic types of selflocking fasteners chemical additive type introduction to selflocking fasteners technical introduction. 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. A bolt comprises of a head, cylindrical body and threads along its length. Elevator bolts elevator bolts are often used in conveyor systems. Fastener type chart bolt depot nuts and bolts, screws. Acceptability of screw threads shall be determined based on ansiasme b1. 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. Feb 22, 2018 types of bolts and their uses head shapes. Cheat guide chart bolts, screws, washers, nuts, drive charts working on a project and trying to find the name of a special bolt type. Chart of nut, bolt and screw types screws, bolts, nut bolt.

Nylon insert jam lock a nylock nut with a reduced height. Nonthreaded metal fasteners, except aircraft types. These nuts have different functions in the fastener industry. Bolts come in several configurations for their application and specification variances. 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. This type permits the parts to be readily disconnected without damaging the fastener, e. The most common type of bolt head types includes square, hex, slotted hex washer and socket cap. 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. This chart illustrates the different style nuts used in the industry. This method employs a hydraulic ram placed over the nut and a threaded puller which attaches to the ram. The earliest bolt heads in use were the square heads. Also known as a coach bolt, has a domed or countersunk head.

They will learn how to measure a bolt and determine the thread type by using a thread gauge. Allpro threaded neither employs nor maintains an engineering or technica l. Nuts are almost always used in conjunction with a mating bolt to fasten multiple parts together. Bolts, nuts, hex head bolt nut, heavy hex bolt nut, fastener. Types of bolts and their uses the nuts and bolts blog. A short guide to metric nuts and bolts 2 thomson rail. An acorn nuts has roughly the same design as a cap nut, except that its rounded end has a higher crown. Bolts have external male thread and nuts have internal male thread.

Heavy nuts are quite common and readily available in various types and sizes but heavy head bolts have more limited availability. 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. Srjc, engr45, 2012 the nuts and bolts behind engineering. Wood screws have large threads and a smooth shank f or pulling two pieces of material together. Antivibration selflock screw and flange nut set with low neck. Bolts are generally have the flat head which means there is no grove on the head.

The shape of the head is depended upon the purpose for which bolt is required. Abbreviated hhmb or lvanized nuts and washers will fit galvanized bolts. Since the terms bolt and screw were in use before the advent of easilyproduced helix fasteners. Types of nuts nut types this site has many useful charts illustrating fasteners and their uses. Students will also be taught how to drill a hole and tap a thread into. Bolts are measured in many different types of parameters. Tee a nut designed to be driven into wood to create a threaded hole. When this type of fastener is used, the parts will never be.

Heavy hex a heavier pattern version of a standard hex nut. What types of screws, nuts, washers and bolts are used in a. The last are used in concretesteel composite structures as shear connectors. A coupling nut is a threaded fastener used for joining two male threads, most commonly threaded rod.

The square section under the head grips into the part being fastened preventing the bolt from turning when the nut is tightened. The size most commonly associated with screw threads is the nominal diameter. A gallery of 12 common bolt types by definition, bolts are threaded fasteners that are intended to be mated with a nut. 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. The nut is a type of a fastener which has a threaded hole in it. This method is used to tighten bolts that have diameters greater than 20 mm, as these bolts need an extremely high tightening torque. Bolts with a hexagonal head with threads for use with a nut or tapped hole. 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. What is a nut a nut is a type of fastener with a threaded hole. Anchor bolt bolt designed to allow objects to be attached to concrete. Similar to an eye bolt but with wood threads instead of machine thread.

Certain types are some times referred to as stove bolts. Full fastener products dowedo ningbo windo metal co. Failure modes of bolt and nut assemblies under tensile. 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. The nut is always used in joining with a mating bolt to fasten various parts together. 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. Identification charts for different types of fasteners. About 11% of these are screws, 3% are nuts, and 23% are bolts.

Nuts, bolts and fasteners 228 suitable for connecting description material article no. Nut types pdf print format this chart shows the different styles of nuts used in the manufacturing industry. The outside of the fastener is a hex so it can be driven with a wrench. 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.

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. 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. 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. These nutss may have different thread counts for the different types of bolts. Most engineers design for a maximum of one installation before the bolt must be recoated. The nut styles range from hexagonal heads, regular square nuts, machine screw nuts, thumb nuts, nylong insert stop, cap nuts and other style types. Select a category below to view a picture and information on that type of fastener. 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. 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. Type description a4 a4 kg sm henum10x 72950 sm henum10x140 72951 sm henum10x150 72952 nuts, bolts and fasteners nuts, bolts and fasteners.

Types of nuts nut typesthis site has many useful charts illustrating fasteners and their uses. Mar 20, 2020 types of bolts designing buildings wiki share your construction industry knowledge. This technical information is supplied as a courtesy. Bolts as well as screws are available in a vast variety of head shapes. A bolt is a type of threaded hardware fastener that is used to position two workpieces in specific relation to each other. Bolts are typically used to hold materials or objects together, or to position objects. 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 sm lsnum6x20 a4 71982. 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. 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. An acorn nuts has roughly the same design as a cap nut, except that its rounded end has a. Allpro threaded neither employs nor maintains an engineering or technica l staff, and allpro is merely supplying certain.