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Finish: Plainand hot dip galvanized. 0000004769 00000 n Bolt lengths 6: Thread length = (2 X diameter) + 1/4 standard. Customary fastenersis specified in inches, usually fractional rather than decimal. For general enquiries: 03457 201201 (standard rate line), Raspberry Pi, Arduino & Development Tools, Engineering Materials & Industrial Hardware, Development Tools & Single Board Computers, Industrial Push Buttons, Pilot Lights & Control Stations, Pneumatic Counters, Logic Controllers & Timers, Electronics Cleaners & Protective Coatings, Electronics Components, Power & Connectors.
0000002914 00000 n It Standard and Custom Bent bolts from ITA Fasteners are durable and corrosion resistant because of the stainless steel make. 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). As for lock washers, which are often split (helical spring) type, use regular for Grade A307 and Grade 2 bolts and high alloy for Grades 5 and 8, although there was a period when the SAE did not recommend using split lock washers with Grade 8 bolts. Larger sizes are not manufactured in short lengths, just as smaller sizes are not available in long lengths. Then click the Send button to send your friend an email. The ISO metric thread size system is widely used around the world. threads of this Fine Series have greater tensile stress area than comparable sizes of the Hex bolts are not pointed whereas hex cap screws have a chamfered (beveled) point to protect the first thread from damage and to facilitate entry into an internally threaded part such as a nut or tapped hole. (More information about finishes can be found in our Tech Data section.).
MORE INFORMATIONIt is considered good practice to debur all holes to ensure a smooth, flat mating surface. Stainless steel is another popular choice for hex bolts thanks to its strong corrosion-resistant properties. Our guide is here to help you understand what self-drilling screws are, their uses, and the types available. 0000002993 00000 n Thread class: A classification system to classify the threads for Bolt lengths > 6: Thread length = (2 X diameter) + 1/2
It is advisable to match materials and finishes of bolts, washers and nuts. For heavy hex bolts, it shall conform to ASTM A 307, Grade B. 0000001258 00000 n trailer Contact us| stainless steel grade 316 has been cold worked to provide a minimum tensile iso 4014 bolt strength of 700 MPa. 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. Grade 2 flat washers should only be used with Grade A307 and Grade 2 hex bolts. For specifications such as A307 grade B, A325 and A490 that require a heavy hex pattern, refer to dimensional tolerances forheavy hex boltsorstructural bolts. It has 60 thread angle and Coarse threaded fasteners have fewer threads per inch than fine threaded fasteners because coarse threads are farther apart. Therefore, be sure to adjust torque values accordingly to prevent overtightening a lubricated bolt. Origin: Domestic and import 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. Steel remains the least costly material followed by stainless steel; the copper alloys (such as brass and silicon bronze) are the most expensive. dimensions are stated in inch units. Instead, use a tapered dowel pin to first align the parts, then insert the bolt. %%EOF resistance against stripping (internal threads) .UNC give possibility for quick assembly. ASTM A307 grade A bolts, all SAE hex bolts, and several other common specifications require a standard (finished) hex head. 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. Hex bolts are also known as: A hex bolt is often differentiated from a hex cap screw by its underhead bearing surface: if it has a circular boss, called a washer face, it's a hex cap screwif it doesn't then it's a hex bolt. The hexagon-shaped head ensures that it is easy to grip hex bolts from multiple angles, using different types of tool. It uses rotational force to drive the bolt firmly and securely into place, helping to provide easier entrance and exit into the material whilst also providing added grip. under the higher torque values normally associated with Grade 5 and 8 bolts.
Screw thread gauging systems for acceptability are covered in the ASME IS1364, ISO 4014, ISO 4017, DIN 933, DIN 931, BS 1083, For d 1 0000001753 00000 n 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). The thread of a hex head bolt, also known as the screw thread, is the helical structure which comprises the main body of the bolt. You may also find hex bolts made from other materials like brass, but this is less common. This additional size chart is intended for use with DIN standard 931 bolts (hex bolts which have a completely threaded shank). 0 Hex Bolts are bolt fasteners with six sided hexagon head and externally threaded body. 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. x1 04) :Ljo4C. MATERIALSCommon materials are steel (unplated and plated; see Finishes below), stainless steel, brass, silicon bronze, and nylon.
Depending on the length of the bolt, it can come with standard threading or full threading. This makes their installation and removal a straightforward process, plus ensuring it is also easy to loosen or tighten hex bolts once they are in situ. Thread Gages and Gauging : Specifications and dimensions for the gages used on Unified inch screw thread with thickness around 0.015 in to 0.035 in depends on the diameter of the screw. They come in a wide range of different hex bolt sizes for custom applications depending on its dimensional requirements. Other surface treating techniques include the fasteners being treated with finishes like auto black, dacromet, geomet and phosphate. Length is measured from the underhead bearing surface to the extreme point (threaded end) of the bolt. The strengthoftheiso 4014 bolt m10x18is indicated by the marking on the head and it is also defined by the applicable product standard. thread is intended for general purpose fastening operations. 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. While it may not be completely preventable, it can be substantially reduced. Also, use hot dip galvanized hex nuts with hot dip galvanized bolts. 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). Because Grade 2 flat washers are made of soft, low carbon steel, they will "yield" (compress, cup, bend, etc.) About us| The type of finish also affects friction, which affects torque. 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. fasteners, Anchor Bolt and Construction Fastener Manufacturer, Portland Bolt & Manufacturing Company, LLC. Similar to the A2, the A4-70 iso 4014 bolt material specification is an austenitic, acid proof stainless grade. is used in materials with low tensile strength which makes threads more It is also used where the length of engagement Hexagonal head profile enables easy wrenching while putting enough torque to the bolting joint. (Refer to our Tech Data section for additional information about nuts and washers.). 0000004539 00000 n Unified Screw Thread Calculator.
Usually, the A4-70 is manufactured from stainless steel grade 316 material or its low carbon variant grade 316L. 0000002639 00000 n 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." 1753 16 ,F.D.
Hex bolts can be used for many different applications that include fasteningwood,steel, and other construction materials for projects such asdocks,bridges,highway structures, andbuildings. (Also see below for the difference in point styles between the two.). The following sections provide further detail on some of the key hex bolt types, giving you the knowledge you need in order to make a fully-informed buying decision.
stainless steel ss 304/ SS316 A2/A4, 18-8 Stainless Steel, SS303, SS201, SS316, SS304, SS904L, SS316L, A4-70; A2-70; A4-80, UNC & UNF, ASME B1.1, Class 2A (Fastenal will inspect and accept parts with a 1A no-go gauge), Cold Heading, Wire Drawing, Heat Treatment, Insert tapping, Inspection, Packing, Surface Plating, custom product will according to special requirement, Regular product is about 7-15 days, Cadmium, Black Oxide, Teflon, Galvanized, Zinc, Xylan, Others Upon Request, Paypal, T/T,Western Union, L/C or Trade Assurance 30% deposit & balance before shipping, Electroplating (color, blue, white, black zinc, Ni, Cr, tin, copper, silver). If you require a size that is not listed, Portland Bolt will manufacture them. Hex bolts can be categorised in a number of different ways chiefly their sizing, the material or finish used in their manufacture, and whether they are fully or partially threaded. 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.
SUMMARYHex bolts are summarized in Table 5.
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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. If you require stainless steel hex bolts, hex head bolts or hex bolts in large orders, get in touch with us to get a quote. Although brass provides a high level of resistance against corrosion, it is usually more expensive so is often overlooked in favour of steel. Hex bolts are used with hex nuts or a tapped hole. 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. 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. They are usually available from aircraft and military parts suppliers. Double ended threaded studs from ITA Fasteners are steel bolts which are threaded on both ends. As a result, it can be difficult to locate an accurate chart which covers a range of hex bolt types and sizes. Partially-Threaded Hex Bolts Partially-threaded hex bolts are only threaded from partway down the bolts length to the end. Additionally, different coatings and finishes are available. (You and your friend will not be contacted or added to any email lists.). Hex bolts are typically manufactured from steel or stainless steel. Nylon is lightweight, has excellent elasticity, resists chemical solvent attacks, is electrically insulating and self-extinguishes if subjected to fire. Generally speaking, stressed bolts in critical applications should not be reused. They offer strong tensile properties and most standard types can be used in multiple locations (dependent upon the material and finish). Silicon bronze and stainless steel, though, are the better choices when corrosion is of concern. UNC (Unified National Coarse): Eye bolts are a commonly used component in various construction.
Also, use only SAE pattern flat washers with Grade 5 and 8 bolts because, as it is explained, the oversized hole in USS washers is too large to properly support the bearing surface of the bolt's head and one washer size smaller will be too tight and may cause the head to fail. More exposed threads within the grip (the area between the head and nut) will result in a "springier" bolt. - The bearing surface under the head of hex cap screw is flat and washer faced coarse series. "Jagged tears," created by both threading dies and lathes, are said to be stress raisers and a stress raiser can be a point of failure. For heavy hex bolts the range is from 3/8 inch to 3 inches. The Fine series is suitable when the resistance to stripping of both external - Unless otherwise specified, chemical and mechanical properties of steel hex bolts shall conform to ASTM A 307, Grade A. Diameters: 1/2 1 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. Table 1 summarizes the number of threads per inch for the various sizes. externally threaded member.
There is a tight run out tolerance for this face defined in ASME B18.2.1. Portland Bolt provides anchor bolts and nonstandard construction When used with a preformed internally threaded (tapped) hole, the hex bolt's head is turned to tighten, which technically makes it a screw (see our Tech Data section for a discussion regarding the differences between bolts and screws). (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.) Hex bolts are sometimes also known as hex head bolts or hexagon bolts, again due to their distinctive head shape.
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. Our machine screws guide provides everything you need to know about the types, sizes, and uses of a machine screw. 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. Stainless steel, such as 304 and 316, cannot be heat treated and brass and bronze do not respond to heat treatment. Both fully-threaded and partially-threaded hex bolts are available. startxref Oberg, From 4" to 8", lengths usually increase by 1/2". 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. It is a handy international standard for measuring thread sizes across an array of different screw and bolt types. - Bolts with "reduced body diameter", the body diameter shall not be smaller than the minimum pitch diameter of the thread and not exceed the minimum body diameter given in the results table. There is no direct relationship between the grade designation and its strengthfor SAE grades, a higher grade (larger number) represents a higher tensile strength. , Horton H.L. Conversely, there should be two full threads exposed on the head side of the nut to make sure the nut can be properly tightened.
Oberg, E. , Jones and mating internal threads equals or exceeds the tensile load carrying capacity of the The tensilestrength for both these steel grades is around700Mpa. These hex bolts meet the requirements of both F1554 Grade 36 and A307 Grade A. Between 1" and 4", 1/4" steps are common. Hex heads have six flat sides and are also called "6 point." Fully-Threaded Hex Bolts Fully-threaded hex bolts are threaded from the end of the bolt right up to the head. Strain on the unthreaded part of the shank is prevented by the design which ensures that section has no weak spots. ASME B18.2.1-2010, Square and Hex Bolts and Screws (Inch Series).
Not all hex bolts are readily available in all sizes and lengths. 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. works of buildings, railways, bridges, factories, etc. The size of the head varies with the size of the bolt. endstream endobj 1767 0 obj <>/Size 1753/Type/XRef>>stream 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. thread and used for ease of assembly. Steel is available in varying strengths and grades typical standards for steel hex bolts include EN8 steel and EN16 steel. Portland Bolt manufactures hex bolts from 1/2 diameter through 2-1/2 diameter in most ASTM, AASHTO, and SAE specifications. These provide various qualities and appearances in order to suit a wide range of applications. Class 3 is used for closer tolerances. Hex Bolt Dimensions, Sizes, Threads per Inch, Head Dimensions & Minimum Threaded Length, ASTM A307, Coarse Thread, Hot Dip Galvanized, ASTM A307, Fully Threaded, Coarse Thread, Plain Finish, ASTM A307, Fully Threaded, Coarse Thread, Zinc Plated, Grade 2, Coarse Thread, Zinc Plated, Global, Grade 5, Coarse Thread, Plain Finish, Global ($), Grade 5, Coarse Thread, Plain Finish, North America ($$), Grade 5, Coarse Thread, Plain Finish, USA ($$$), Grade 5, Coarse Thread, Zinc Plated, Global ($), Grade 5, Coarse Thread, Zinc Plated, North America ($$), Grade 5, Coarse Thread, Zinc Plated, USA ($$$), Grade 5, Coarse Thread, Zinc Yellow Plated, Global, Grade 5, Fully Threaded, Coarse Thread, Plain Finish, Global, Grade 5, Fully Threaded, Coarse Thread, Zinc Plated, Global, Grade 5, Fine Thread, Plain Finish, Global, Grade 5, Fine Thread, Zinc Plated, Global ($), Grade 5, Fine Thread, Zinc Plated, North America ($$), Grade 5, Fine Thread, Zinc Plated, USA ($$$), Grade 8, Coarse Thread, Plain Finish, Global ($), Grade 8, Coarse Thread, Plain Finish, USA ($$), Grade 8, Coarse Thread, Zinc Yellow Plated, Global ($), Grade 8, Coarse Thread, Zinc Yellow Plated, North America ($$), Grade 8, Coarse Thread, Zinc Yellow Plated, USA ($$$), Grade 8, Fine Thread, Plain Finish, Global ($), Grade 8, Fine Thread, Plain Finish, USA ($$), Grade 8, Fine Thread, Zinc Yellow Plated, Global ($), Grade 8, Fine Thread, Zinc Yellow Plated, North America ($$), Grade 8, Fine Thread, Zinc Yellow Plated, USA ($$$), Stainless Steel 304 (18-8), Coarse Thread, Headed Fastener with External Screw Threads, Hex Bolt, Hex Head Bolt, Cap Screw, Hex Cap Screw, Hex Head Cap, 20 to 6 for UNC (Coarse) and 28 to 12 for UNF (Fine), Not pointed or chamfered to protect first thread and facilitate entry, For Steel Bolts: ASTM A307, SAE Grades 2, 5, 8; also non-standard, Steel, Stainless Steel, Brass, Silicon Bronze, Nylon, For Steel Bolts: Zinc Plating (with Clear or Yellow Chromate), Hot Dip, Common Countries of Origin: Imported, North America (Canada), USA, Nominal Size (a diameter from 1/4" to 4", usually specified in fractional inches), Threads per Inch (20 to 6 for UNC and 28 to 12 for UNF), Bolt Length (in inches, measured from the underhead bearing surface to the extreme point), Grade (for steel bolts only: ASTM Grade A307, SAE Grade 2, 5, 8; or non-standard Grade 9), Material (steel, stainless steel, brass, silicon bronze, nylon; if not specified, steel is assumed), Finish (for steel bolts only: plain, zinc plated or hot dip galvanized), Country of Origin (imported, North America [Canada], USA; if not specified, imported is assumed), 5/16-18 x 7/8" Hex Bolt, ASTM Grade A307, Plain Finish, 3/8-16 x 3 3/4" Hex Bolt, SAE Grade 8, Yellow Zinc Plated, USA. As an example, a hex bolt with a thread size of M8 would have an outer diameter of 8mm. xref Lengths: 30 maximum Longer than 8", expect 2" steps. This could include: During the erection, repair, and maintenance of buildings, bridges, and road infrastructure, Woodworking tasks such as fastening frames. @2cBpcp 40VOywekSiWJnKbX)7P38,f.b2+,Y 6Eou.f z And while bolts can fail from being overtightened, they can also fail by being undertightened. After the stud is screwed and secured in the middle Copyright 2019 Industrial Tools Agency | All rights reserved. Do not align parts by "tapping" a bolt into positionserious damage to the bolt can occur. , Ryffel H.H., (2016) .
Hex Bolt and Heavy Hex Bolt Dimensions according to ASME B18.2.1-2010 standard. 0000002690 00000 n The iso 4014 hex bolt can be surface treated to a variety of coatings. - If either of the following conditions exists for the hex and heavy hex head bolt, the bolt shall be threaded for full length.
class is designed for general use. As compared to stainless steel grade 304, grade 316 provides better overall corrosion resistant properties. As a result, there will be a reduction in clamping force as the washer yields. Consequently, the connection will not be as "tight" as with a new bolt. These are as follows: The length of the bolt (measured from the end of the bolt up to under the head), Thread size (the size of the thread, typically using ISO metric or M-style measurements), Thread pitch (the number of threads per inch the finer the bolt, the more threads per inch and the higher the thread pitch). 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.