types of bolts and nuts

Fast Shipping & No Order Minimums! There is not any effect of rust and corrosion on steel made screws. Globalspec.com. Frame applications such as truck and bed frames. Shop our Hex Lag Screws, Self-drilling screws have a sheet metal thread with a self-driller cutting (TEK) point to pierce through 20 to 14 gauge metals. The components that form a bolt can be identified in three sections. Often used in decorative finishes or applications. Washers are made from a variety of materials, the most popular of which are galvanized carbon steel and stainless steel. Externally bowed are radially installed. Wood Screw, Sheet Metal Screw, Hex Bolt, Lag Bolt, etc.

Table credit: Engineering Parts Sourcing Inc.

An oversize flat washer used Also known as blind rivets, they are used to connect two pieces of material in quick, efficient way.

They have a female threaded portion to accept the threaded rod into it. Medium carbon steel - tempered and quenched, Medium carbon alloy steel - quenched and tempered.

Also known as zinc and yellow, z/chr, or zinc and chromate. Shop Square Washers, POP Rivets, also known as blind rivets, are used to connect two pieces of material in quick, efficient way. With an expanding wing-like nut, toggle bolts are used to mount objects to walls. The higher the TEK number, the larger the drill point to pierce heavier gauge metals. Tooth Lock. The nut has a domed top to prevent contact with the external thread. This form is also known as a "female" thread. A nut with a built in washer They are designed with an intentional flaw to snap the hexagonal head off once the maximum torque is reached.

We offer large selections of wholesale bolts, nuts, screws, washers & other fasteners online. Bolts with a smooth rounded head that has a small square section underneath. Low carbon content provides protection from hardening. However, as they have a head and a shaft component, many still classify them as bolts. Plain finish products provide no resistance against corrosion. There are various ways to classify the types of bolts and their uses, and all the considerations mentioned above make up the final choice of a bolt to be used in a certain application. head that has a small square section underneath. The nut inserts through a hole before it expands to lay flat against the surface. Bolts with a hexagonal head Shop our Socket Cap Screws, Set screws are most often headless (aka blind), meaning that the screw is fully threaded and has no head.
Bolts as well as screws are available in a vast variety of head shapes. Contains a countersunk flat head followed by a square undercut and a threaded shaft. Shop External Retaining Rings, Axially installed Internal Rotor Clips or retaining rings are designed to be installed into a groove on a shaft.

Also found in general hardware use. Application: Used most often as cushions or spacers. Good for general use. The wings are easy to grip between the thumb and forefinger, making it possible to tighten the wing nut by hand. When a finish isn’t specified it is automatically understood that the bolt has no coating. Shop Structural Rivets, Tri-Fold rivets, also called exploding rivets, have three cuts in the hat that cause the hat to fold outward when installed into three distinct wings.

Square heads are still in use today but the hex heads have become more common. A nylock nut with a reduced This guide will list and describe the many types of washers and their recommended purposes. The earliest bolt heads in use were the square heads. Shop Acoustical Wedge Anchors, Drop in anchors are internally threaded anchors that are commonly installed overhead and flush with the surface of the concrete. A bolt is a type of threaded hardware fastener that is used to position two workpieces in specific relation to each other. Shop our Machine Screws, Shoulder bolts (also known as shoulder screws or stripper bolts) are machine screws with a shoulder between the thread of the screw and the head of the part. a point for use in sheet metal. Split ring lock washers are used to prevent nuts, bolts and screws from vibrating loose. Description: Named for their common use on car fenders, fender washers are flat washers with a small hole and comparatively large outside diameter. Related Guides. These threads provide the friction and traction that serves a screw's purpose: to assemble or position two workpieces in relation to each other.

Widely used as it is inexpensive. MS washers must meet specific inner diameter and outer diameter specifications.

IEEE GlobalSpec collects only the personal information you have entered above, your device information, and location data. Square head bolts a four-sided bolt head with a machine screw thread. Shop Coupling Nuts, 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. As it serves as the most common type of nut, several variations exist. Bolts come in several configurations for their application and specification variances. The nylon material prevents loosening from vibration and cross threads to stop the nut from backing off of the fastener. UNLIMITED Tooth Lock, Internal Easy hand assembly and used when the nut needs to be removed often. This mixture is heavier than that of clear chromate and therefore offers better resistance to corrosion. Extra thick fender washers are thicker than standard fender washers and are used to prevent pull-through and provide a greater bearing surface under the fastener. Therefore, provides superior resistance to corrosion. Shoulder bolts (also known as stripper bolts) are used to create a pivot point. Carriage bolts are used to fasten metal to wood. Shop Tri-Fold Rivets, Masonry acoustical wedge anchors are used to anchor and secured suspended wire to solid or hollow masonry materials. A hexagonal hole for use with They are called “e” rings because of the three prongs on the inside of the shaft which make contact with the bottom of a groove on a shaft to create a shoulder for effective assembly retention. The fastener is inserted into the pre-drilled hole and then struck with a hammer which extends the wedge to hold the anchor in place. Tightening of the nut pulls the stud end into the expander sleeve, wedging it outwards and locking the anchor into the base material. A process in which bolts are submerged in molten zinc. Structural applications such as fastening walls to concrete. POP Rivets are tubular, comprised of a hat and mandrel; the length of the mandrel is snapped off when installed. Their vast variety has emerged from the type of applications that demands their use. to as a finished hex nut. These colors are used either to hide rivets and create a finished look or to make them extra visual by using the opposing color from the installation material. Shop Break Away Nuts, Tri-groove security nuts have a tapered diameter making them difficult to grip with grabbing devices such as adjustable wrenches or pliers. You may withdraw your consent at any time. Sex bolts do not require a nut. Used in manufacture of plow in early days. The Differences Between Self-Tapping and Self-Drilling Screws. I like your post… its really user friendly that conveys lot of information. A bolt contains two parts a shank and head. Description: A belleville washer, sometimes called a conical spring washer, has beveled sides that support heavy force with small deflections. Shop Split Ring High Collar Lock Washers, External tooth lock washers are used for locking and tension. Shaped like the letter J. A long thin body with a flange at one end resembles a T in profile. North American countries follow this system, called the Unified Thread Standard. Abbrevi- ated HHMB or HXBT. Zinc coated bolts. A hanger bolt does not contain a bolt head. The shape of the head is depended upon the purpose for which bolt is required. They are cylindrical with slightly beveled ends. Shop Military Standard Flat Washers, Flat washers in the 900 series are round and thinner than a standard flat washer with a smaller inside and outside diameter. An alloy that mixes the attributes of low carbon steel and specific amounts of chromium and nickel. Description: Sometimes called helical washers, split lock washers are non-continuous rings that have each end bent slightly outward in opposite directions. Shop Rivet Backup Washers, Belleville conical washers are a type of washer that adds extra tension to a fastener assembly. Shop Sammys Screws, Concrete masonry sleeve anchors consist of a threaded stud with an outwardly flared cone-shaped end, with a nut and a washer on the end. Hexagonal heads are used with a wrench or a spanner to provide a torque. Local store prices may vary from those displayed. Thread Cutting Machine Chicago bolts, barrel nuts or sex bolts are all names for the same uniquely-shaped type of bolt. The earliest bolt heads in use were the square heads. Used to fasten concrete to equipment, materials, generators, motors, pumps, pipe, strut, plastics and wood. Rod shaped fasteners with threads on one end and bent into a loop on another. These standards are common in the majority of the world, and speculation exists that this may become a global hardware standard. Shop Finishing Cup Washers, Flat washers are round outer diameter thin plates with a center hole punched to the size of the bolt or screw.
When choosing between hardware washer types, remember to consider both the washer’s applications and the type of nut or other fastener you will be using. Within each of these categories are more specialized forms that serve unique purposes. An extra wide head with like flange. Description: Finger spring washers have three curved flanges.

Shop Unthreaded Rod, External Bowed E radially assembled Rotor Clips or retaining rings are designed to be installed into a groove on a shaft. Mating screws have a shoulder that matches the diameter of the sex bolts they are used with. The undercut of the bolt head is square to hold the bolt in place once tightened. By submitting your registration, you agree to our Privacy Policy. It also provides high resistance to corrosion and forms a soft material. A hex bolt's shaft may have threading all the way up to the head, or it may be only partially threaded. Many items are available in a wide variety of finishes, grades, and features. A blind set screw, known in UK as a grub screw, is almost always driven with an internal wrenching drive, such as a hex Allen key. Shop Fender Washers, Fender washers are round washers with a small inside diameter hole. Stud bolts utilize hex nuts on both ends of the bolt.

This expansion presses against the installation surface creating a tight, secure hold. Include me in professional surveys and promotional announcements from GlobalSpec. Shop Deck Screws, Lag screws, also called lag bolts, are large wood screws. Smaller than a hex jam or hex finish nut, they are used with machine screws under 1/4" diameter. However, as they have a head and a shaft component, many still classify them as bolts. While they're a ubiquitous sight among any builder's materials, both nuts and bolts come in a wide array of styles, each dedicated to a particular function. Application: Used to lock shallow-headed fasteners into place and absorb shock and vibrations. Coating thickness is much more than that of zinc plating due to submerging of bolts. Once installed, the non-threaded portion extends out of the surface of the application site, allowing the bolts to act as dowels or shafts for moving parts. Example: Lag Bolts and Lag Screws are the same thing. Search manufacturer catalogs by these specifications: I agree to receive commercial messages from GlobalSpec including product announcements and event invitations, https://boulonseclair.com/, Hey! Are similar to the standard hex head bolts but have shorter thread lengths, in order to be used in structural applications. Want to learn more about Fasteners?

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