hexagonal bolt specification

Increased adhesion of the thread surfaces from the clogging-shearing-locking action causes the galling phenomenon. Since it is externally wrenched, sufficient space around the head must be allowed for a wrench or socket. COUNTRY of ORIGINUnlike other types of fasteners, which mainly come from offshore manufacturers, you have a choice with SAE Grade 5 and 8 hex bolts: imported (often from Asia), North America (Canada) and domestic (USA). Their primary use is for heavy-duty fixing and fastening applications. THREADS and POINTHex bolts have either cut or rolled screw threads that comply with the Unified system: UNC (Unified National Coarse) and UNF (Unified National Fine). under the higher torque values normally associated with Grade 5 and 8 bolts. While some manufacturers offer hexagonal bolts made from other materials, steel and stainless steel hex bolts are the norm. Hex bolts dimensions are defined in both metric and imperials sizes with unified national coarse pitch (UNC), fine pitch (UNF), fixed pitch (UN) and iso metric thread profile. They can then be tightened using a range of tools including a hex bolt wrench, socket sets, spanners, hex keys, and ratchet spanners. (Also see below for the difference in point styles between the two.). Bolt lengths 6: Thread length = (2 X diameter) + 1/4 By definition "A Bolt is a headed and externally threaded mechanical device designed for insertion through holes in assembled parts to mate with a nut and is normally intended to be tightened or released by turning that nut." hex head bolts, cap screws, hex cap screws, hex head cap screws, machine bolts, hex machine bolts, hex head machine bolts and, if fully threaded, tap bolts, hex tap bolts and hex head tap bolts. If severe enough, seizing can occur preventing further rotation of the nut in either direction. , Horton H.L. B1.3-2007 standard. Hex bolts are used with hex nuts or a tapped hole. Click through to shop some of the most common hex bolt thread sizes: Most hex bolt size charts refer to a specific range of products. 0000001753 00000 n Stainless steel, such as 304 and 316, cannot be heat treated and brass and bronze do not respond to heat treatment. To find the minimum pitch diameter of the thread, visit Coarse bolts are more common, and there are advantages and disadvantages to both coarse and fine threads. The bolt should be long enough to allow at least two full threads to extend beyond the nut face after tightening, which ensures full thread engagement with the nut. Properly installed fully-threaded hex bolts are designed to spread the pressure across the full length of the bolt, providing a greater level of strength than partially-threaded alternatives. Alternatively, stainless steel alloys having different hardnesseslike a 316 nut and a 304 hex bolthave less tendency to gall. Special tooling can be created to produce nonstandard head dimensions or bolt heads with your companys name and/or logo. externally threaded member. For heavy hex bolts the range is from 3/8 inch to 3 inches. These Hex Bolts come in the anti-corrosion stainless steel, alloy steel and carbon steel materials which ensures that the structure doesnt weaken because of rust. Class 1 threads are loosely fitting %PDF-1.4 % (More information about finishes can be found in our Tech Data section.). Lengths: 30 maximum Larger sizes are not manufactured in short lengths, just as smaller sizes are not available in long lengths. While it may not be completely preventable, it can be substantially reduced. Oberg, E. , Jones thread and used for ease of assembly. Contact us| When a hardened flat washer is placed under the head, be certain the "rounded" side is against the headthe "sharp" side of the washer can damage the bolt's underhead fillet (the concave junction where the head and shank meet), which can lead to bolt failure. E. , Jones ,F.D. Hex bolts are sometimes also known as hex head bolts or hexagon bolts, again due to their distinctive head shape. Thread Gages and Gauging : Specifications and dimensions for the gages used on Unified inch screw thread It has 60 thread angle and 0 The ISO metric thread size system is widely used around the world. Include a message if you wish. Lengths range from 3/8" to 24"; 1/2" to 10" is typical. The A2 version of the iso 4014 bolt material is manufactured from Stainless Steel grade 304, which is known for its Corrosion Resistant properties. Bolt lengths > 6: Thread length = (2 X diameter) + 1/2 Longer than 8", expect 2" steps. Conversely, there should be two full threads exposed on the head side of the nut to make sure the nut can be properly tightened. xb```b``Ic`a``Wfc@ >v daX( -`h_ [o|J 0000001472 00000 n As a result, it can be difficult to locate an accurate chart which covers a range of hex bolt types and sizes. Nylon is lightweight, has excellent elasticity, resists chemical solvent attacks, is electrically insulating and self-extinguishes if subjected to fire. (An easy way to remember these SAE bolt grades is to add "2" to the number of lines: no lines + 2 = Grade 2; 3 lines + 2 = Grade 5; and 6 lines + 2 = Grade 8.) class is designed for general use. Types of gages including thread plug gages, snap gages, thread ring gages and plain diameter gages for internal and external threads are covered in same Hex bolts with forged heads are also commonly used asheaded anchor bolts. A bolted joint will be no stronger than its lowest graded component, so a Grade 2 nut and a Grade 8 bolt will create a Grade 2 joint at best. Eye bolts are a commonly used component in various construction. They come in a wide range of different hex bolt sizes for custom applications depending on its dimensional requirements. These screws feature Carriage bolts are mostly used in wood to wood fastening and general construction of decks, porches, swing sets and other home auxiliary units. These are produced across all material categories and astm specifications. From 3/8" to 1", lengths are in 1/8" increments. As the name implies, they have a hexagonal head and come with machine threads for a firm and rough handling. These Hex Bolts can also be used in marine and coastal operations due to its anti-corrosion property. For instance, it can be coated with zinc by either electroplating (clear (blue) zinc electroplated and yellow zinc electroplated) or by immersing the fastener in zinc during hot dip galvanization. Hex bolts made from stainless steel can be used in either internal or external applications, but zinc-plated steel is another common alternative well-suited to indoor uses. As compared to stainless steel grade 304, grade 316 provides better overall corrosion resistant properties. Refer to Table 1 for head width (width across flats), which is wrench size, and width across corners for each bolt size. Imported fasteners tend to be the least expensive, North America is priced a little higher, and domestic may be the most expensive. UNF (Unified National Fine): External For d 1 Hex Bolt and Heavy Hex Bolt Dimensions according to ASME B18.2.1-2010 standard. DESIGNATIONHex bolts are typically described as follows: NUTS and WASHERSWhen selecting a nut for use with a graded hex bolt, it is very important that the nut be the same grade as the bolt; one grade higher is also acceptable as one source states. Hex bolts from ITA Fasteners are mostly used in repair and construction work. SIZES and LENGTHSThe size and length of inch series fastenersalso known as English, Imperial and U.S. For heavy hex bolts, it shall conform to ASTM A 307, Grade B. TIGHTENING TORQUE and FASTENER REUSEHex bolts are often tightened to specific torque values, especially the higher grades. pitch, or where finer adjustment is needed. There is no direct relationship between the grade designation and its strengthfor SAE grades, a higher grade (larger number) represents a higher tensile strength. startxref The fasteners used in structural Self Clinching Studs from ITA Fasteners are mostly used for fastening materials on to sheet metals. As a result, hex bolts are a widely used staple fastener. ASME B18.6.3 *Exception: screws 6 inches and shorter are fully threaded. Right-hand threads are standard (turn clockwise to tighten). Consequently, the larger the number of threads per inch, the finer the thread. ASTM Grade A307 is the lowest, in terms of both strength and cost followed by SAE Grade 2; SAE Grade 5 offers medium strength; and SAE Grade 8 is the highest SAE grade and is usually priced the highest as well. in, if L LT + 3.5*pitch. Use hardened flat washers with bolt Grades 5 and 8. The Fine series is suitable when the resistance to stripping of both external Unified Screw Thread Calculator. We ensure that all our products are durable and high strength components which can only enhance your work's credibility. Grade 2 flat washers should only be used with Grade A307 and Grade 2 hex bolts. The following hex bolt size charts should help you to easily select the most suitable product for your requirements. @2cBpcp 40VOywekSiWJnKbX)7P38,f.b2+,Y 6Eou.f z The good corrosion properties of the iso 4014 hex bolt manufactured from grade 316 stainless steel can be attributed to the high molybdenum content in its alloy. Flat washers are used to increase the bearing surface of the bolt's head or nut thus spreading the clamping force over a larger area. 0000004539 00000 n 0000000631 00000 n Table 1 summarizes the number of threads per inch for the various sizes. Hex Bolts are bolt fasteners with six sided hexagon head and externally threaded body. Hot dip galvanized, stainless steel and silicon bronze are usually recommended if the bolts will be used with pressure preservative treated wood such as "ACQ" (Alkaline Copper Quaternary)check local building codes and contact your lumber supplier for recommendations. Instead, use a tapered dowel pin to first align the parts, then insert the bolt. (For more information about threads, visit our Tech Data section.) It Standard and Custom Bent bolts from ITA Fasteners are durable and corrosion resistant because of the stainless steel make. Steel fasteners are magnetic, stainless steel may be slightly magnetic, brass and silicon bronze are not made of iron (nonferrous) so they are nonmagnetic, and nylon is nonmetallic and nonmagnetic. An the size range for threads ranging from M1,6 to M24 and nominal lengths up to and including 10d or 150 mm, whichever is the shorter for product grade B. Please enter your friend's name and email address, and your name and email address below. Hex bolts shall conform to ASTM A307, Grade A steel. Head markings identify the grades: A307 is usually identified as 307A or 307B, no lines is Grade 2, three radial lines 120 apart identifies the fastener as Grade 5, and six lines at 60 intervals are used for Grade 8. Unified national fine (UNF),Unified national coarse (UNC), UNJC and UNJF threads, Unified national extra fine (UNEF), UNK threads, UNR threads, Constant-pitch threads. 0000001258 00000 n Hot dip galvanized is a thick coating of zinc that protects against corrosion in harsh environments and has a dull gray appearance. UNC (Unified National Coarse): Since it is preferable for the bolt to break before the threads stripbecause a broken bolt is more easily discovered than diminishing clamping force as threads gradually stripthe nut should never be a lower grade than the hex bolt. Sign up for our bi-monthly email newsletter for all the latest! stainless steel grade 316 has been cold worked to provide a minimum tensile iso 4014 bolt strength of 700 MPa. ,F.D. (You and your friend will not be contacted or added to any email lists.). Portland Bolt manufactures hex bolts from 1/2 diameter through 2-1/2 diameter in most ASTM, AASHTO, and SAE specifications. An unthreaded shank (also known as grip length) joins the threaded shank and the head. Copyright 2001-2022 Fastener Mart, LLC. shall be as agreed upon by supplier and purchaser. These hex bolts meet the requirements of both F1554 Grade 36 and A307 Grade A. Understand what hex bolts are, their uses, how they work, their materials, and the different sizes available. This could include: During the erection, repair, and maintenance of buildings, bridges, and road infrastructure, Woodworking tasks such as fastening frames. Generally speaking, stressed bolts in critical applications should not be reused. The tensilestrength for both these steel grades is around700Mpa. - Bolt threads, when rolled shall be Unified inch coarse, fine or 8 thread series with tolerance class of 2A (UNRC, UNRF, or UNR-8). Never replace a graded hex bolt with a lower grade or lower strengthdo not substitute a stainless steel or silicon bronze bolt for a Grade 5 or 8 bolt, or a brass bolt for a Grade 2, 5 or 8 bolt. Hex bolts are used in construction works and generally intended to be used with a nuts. Strain on the unthreaded part of the shank is prevented by the design which ensures that section has no weak spots. Fully-Threaded Hex Bolts Fully-threaded hex bolts are threaded from the end of the bolt right up to the head. endstream endobj 1767 0 obj <>/Size 1753/Type/XRef>>stream Threads that produced with other production methods may be Unified inch coarse, fine, or 8 thread series (UNC, UNF, or UN-8.). , Horton H.L. , Ryffel H.H., (2016) . Coarse threaded fasteners have fewer threads per inch than fine threaded fasteners because coarse threads are farther apart. Some important notes from the ASME B18.2.1: - The diameter range of hex bolts is from inch to 4 inches according to They offer strong tensile properties and most standard types can be used in multiple locations (dependent upon the material and finish). Our machine screws guide provides everything you need to know about the types, sizes, and uses of a machine screw. Hex bolts can be either fully threaded or partially threaded (featuring a clear shank along part of the body) and are suitable for use in a wide range of applications, typically machinery and construction. GRADESUnlike other materials such as stainless steel and brass, steel hex bolts are available in different strength "grades" as designated by the ASTM (American Society for Testing and Materials) and SAE (Society of Automotive Engineers), which are considered the most common strength grade systems for externally threaded carbon steel fasteners. As a guideline, the higher the number, the stronger the steel. They are usually available from aircraft and military parts suppliers. After the stud is screwed and secured in the middle Copyright 2019 Industrial Tools Agency | All rights reserved. Grade 9 hex bolts are generally accepted to be about 20% stronger than SAE Grade 8 bolts. For example, a coarse threaded 1/4" hex bolt has 20 threads per inch whereas a 1/4" fine threaded bolt has 28 threads per inch. The difference between hex bolt and heavy hex bolt is that heavy hex bolt has larger bolt head and head bearing area than hex bolt. It is a handy international standard for measuring thread sizes across an array of different screw and bolt types. - The bearing surface under the head of hex cap screw is flat and washer faced Click on a Hex Bolt style above to continue shopping. Stainless Steel 304 / 304H / 304L Fasteners, Stainless Steel 316 / 316H / 316L Fasteners, Hop Dip Galvanized (HDG) phosphorization, Zinc Plated (Yellow, White, Blue, Black), Geomet, Black Oxide, anodization, Dacroment, Zinc-Nickel plated, Nickel plated, Tin Plated, Brass Plated, Copper Plated, Black Plated, Salt fog test, Gold Plated. Additionally, different coatings and finishes are available. If, say, you are using a zinc plated hex bolt, use a zinc plated washer and zinc plated nut. MORE INFORMATIONIt is considered good practice to debur all holes to ensure a smooth, flat mating surface. There is a tight run out tolerance for this face defined in ASME B18.2.1. This can be attributed to the high content of chromium and nickel in the alloy of the iso 4014 bolt m8x15 (Metallurgically, the A2 or the ASTM-304 has a designation of 18/8 Stainless Steel or 18% Chromium & 8% Nickel). Although the A2 is mostly considered to be a non-magnetic austenitic stainless steel grade, some residual magnetism of the alloy can be introduced when the material of the ISO 4014 Bolts are cold worked. If you require a size that is not listed, Portland Bolt will manufacture them. Since it is made out of such strong materials, these high quality grade 8.8 bolts are often used in high-temperature environments like automotive parts assembly. These provide various qualities and appearances in order to suit a wide range of applications. - Its permissible to have die seam on the body of hex bolt Do not align parts by "tapping" a bolt into positionserious damage to the bolt can occur. 0000007667 00000 n Thread class: A classification system to classify the threads for Then click the Send button to send your friend an email. ASME B18.2.1, JIS B1180, DIN 558, ISO 4018, DIN-EN14399-4, DIN 601, ISO 4016, CSN 21301, EU 24016, DIN 7968, DIN7990. This additional size chart is intended for use with DIN standard 931 bolts (hex bolts which have a completely threaded shank). Also, use hot dip galvanized hex nuts with hot dip galvanized bolts. thread interchangeability among these three nations. This, however, is the minimum threaded length and manufacturers may thread the bolt substantially more. The hexagon-shaped head ensures that it is easy to grip hex bolts from multiple angles, using different types of tool. For specifications such as A307 grade B, A325 and A490 that require a heavy hex pattern, refer to dimensional tolerances forheavy hex boltsorstructural bolts. In addition, some longer bolts are fully threaded and are often called tap bolts. All rights reserved. A stress raiser is "A notch, hole, or other discontinuity in contour or structure which causes localized stress concentration.". Diameters: 1/2 1 This thread form Square, Hex, Hex flange, Round, T-head , Flat & Triangular etc, Square, Hex, Oval, Triangular & Knurled etc, Slotted, Phil, Torx , Hex socket, & square slot etc. form used by the United Kingdom, Canada, and the United States to obtain screw In addition, used hex bolts may produce a lower clamping force for the same torque value due to increased friction. Grade A307 hex bolts are made from low or medium carbon steel as is Grade 2, which is also cold worked; Grade 5 is from medium carbon steel, quenched and tempered; and Grade 8 is manufactured from medium carbon alloy steel, quenched and tempered. Portland Bolt provides anchor bolts and nonstandard construction Most commonly used type for general engineering applications. Hex head bolts are versatile and adaptable fasteners, making them suitable for a variety of uses across a range of industries and applications. resistance against stripping (internal threads) .UNC give possibility for quick assembly. - There are different material options for hex bolt and hex cap screw: ASTM A307 grade A bolts, all SAE hex bolts, and several other common specifications require a standard (finished) hex head. FINISHESUnplated or uncoated steel, referred to as "plain finish," has not been surface treated to prevent rust other than a light coating of oil for temporary protection. Size refers to nominal diameter of the bolt while length is just thathow long the bolt is. It is also used where the length of engagement trailer thread is intended for general purpose fastening operations. Hex bolt is a bolt with a hexagonal head shape and generally used in construction Stainless steel is another popular choice for hex bolts thanks to its strong corrosion-resistant properties. In this guide, we look at what socket sets are, their uses, as well as the different types available to help you choose the right set. Each size is denoted by the letter M followed by a number. Bolts specified as AN (Air Force-Navy), MS (Military Specification) and NAS (National Aerospace Standard) are said to be manufactured to more stringent standards.

• Edmonton Custom Furniture
• X Golf Franchise Locations
• Summit Hotel Big Sky Renovation
• Wood Carving Sets For Beginners
• What Is A Light Well In Construction
• Ankeny Recycling Drop-off
• Steve Madden Suppliers
• Plastic Bags Singapore
• Radisson Blu Canary Wharf Quarantine
• Verizon First Responder $30 Per Line
• Black Iron Arbor With Gate
• Japandi Floating Shelves
• Moncler Rain Jacket Men's
• Giorgio Armani Eau De Parfum