For more information on grades, see table 24 which is reproduced below from the steel construction manual, 15th ed. If you need to convert from imperial or us standard units to metric, or the other way around, one of the tables below should help. Astm, sae and iso grade markings for steel fasteners. To convert from celsius to fahrenheit, first multiply by 95, then add 32. Standard industrial fasteners are manufactured from either carbon or alloy steels. This specification covers anchor bolts that are designed for anchoring structural supports to concrete foundations. For metric bolts strength is according iso 898 mechanical properties of fasteners made of carbon steel and alloy steel described by property classes with designations 4. Apr 28, 2009 in the united states, property classes 8. Eliminate the need for a separate washera these screws distribute pressure where the screw meets the surface without taking up as much space as a washer. Iso 4014 2011hexagon head boltsproduct grades a and b. Din975 high quality m8 aluminium bolt price per piece. Tensile strength psi mpa us bolts no markings grade 2 low or medium carbon steel 14 thru 34. Roughly equivalent us bolt materials metric nut class sae j429 normally used grades astm grades 4.
Bolt grade markings and strength chart mechanical properties head marking grade and material nominal size range inch mm proof load psi mpa min. The number before the first decimal point is approximately onehundredth of the nominal minimum tensile strength of the bolt in newtons per square millimeter or megapascals, which is the same thing. Strength grades for metric fasteners are designated by a symbol comprised of 2 numbers, separated by a decimal. Anybody have insight into why the strongest bolt in the sae classification system is a lower tensile strength than the highest in the metric classification. Threaded rods loads in imperial units weight rating of threaded hanger rods. Always refer to project specifications and consult an engineer to ensure that your application is appropriate. Material, nominal size range inches, mechanical properties. Fastener description material nominal size range in. Mechanical properties proof load psi yield strength min psi tensile strength min psi no grade mark sae j429grade 1 bolts, screws, studs low or medium carbon steel 14 thru 112 33,000. Having a good understanding of these grades goes a long way in selecting the right type of bolt for an application. The united states has sent delegates to the iso tc2 meetings, but instead of adopting the iso fastener standards it was decided that the us would create its own set of metric fastener standards through the american society of mechanical engineers asme, the society of materials and testing astm, and sae international.
China supplier best price iso 4017 aluminium hex bolt and nut. I went into depth explaining the different classes of metric bolts and grades of standard bolts. The markings shown for all grades of a194 nuts are for cold formed and hot forged. Use these studs in clamping applications with tslot nuts and setup clamps. Metric bolt conversion data for industrial boltsrods, machine screws and small diameter fasteners from elgin fastener group includes metric to standard bolt conversions. Grade a325 carbon or alloy steel with or without boron. Metric bolt conversion metric bolt conversion data for industrial boltsrods, machine screws and small diameter fasteners from elgin fastener group includes metric to standard bolt conversions. Other than those explained above, there are various other grades of bolts, which include grade r, metric 8. Use these general purpose screws for a variety of fastening applications. This is followed by the bolt s nominal diameter and the thread pitch. Manufacturers indicate specific grades with tick marks. Low or medium carbon steel, 14 thru 34, 55,000, 57,000, 74,000. Fastener mart offers a wide range of fastener technical datafrom our understanding fastener series of articles, which will introduce you to a variety of fastener and hardware topics and productsto our fastener fasten facts, handy fastener reference data and reference chartsto advanced fastener reference materials in the form of fastener books.
Replace a graded fastener with same or higher grade dont replace a grade 8 fastener with a grade 5 or 2. A table of major diameters and pitches, up to 30 mm in diameter thread classes of fit. Metric nuts proof loads proof loads of metric nuts coarse and fine threads. A domed head sits above the surface of your material. In addition, manufacturers stamp most metric bolts with a number on the bolt head, such as 4.
Sae bolt gradesthe standards for bolt strength grades in the u. How to identify the strength grade of nuts and bolts except for the very lowest grades, metric nuts and bolts all carry iden. Proof load psi yield strength min psi tensile strength min psi standard bolt identification markings. There are no fewer than 5 different threads for different applicaons and 10 different standard strength grades defined for each size of bolt. After manufacturing, steel fasteners should be electroplated, zinc with a yellow chromate conversion per iso 4042, please refer to table for thickness. Understanding fastener grades and classes fastener mart. Grade 2 bolts a307 are a standard hardware grade steel. Jun 15, 2016 fortunately, fastener manufacturers mark metric bolts differently than sae bolts. The tables below are provided as a general guide to help you better understand metric and imperial measurements. For quicker setups than a separate tslot nut and stud, slide these bolts into tslot tracks on machine tool tables.
Unlike screws, which cut their own threads, bolts pair with the internal threads of nuts to stay in place and ensure the desired level of tension in the bolted joint. For a chart of fastener grades, head markings and mechanical properties, see. Stainless steel bolt grades chart beautiful bolt grade chart. From the original jeepl list to the xjlist to the board, a common question comes. The standard american bolt is defined by the inch system designation. Easy, one is manufactured measuring in inches, the other using millimeters.
The chart below summarizes some of the more common grades and classes available here at fastener mart. Iso metric hexagon bolts and screws product grades a and b part 1. On the head of each bolt are two numbers separated by a decimal point, the full list includes ten grades from 3. The diameter and thread pitch are given in millimeters. Bolts under this specification can conform to a headed bolt, straight rod or bent anchor bolt configuration. There are three main systems of bolt classification. Manufacturers emboss international standards organization iso metric bolts larger than 6mm in diameter with either iso m or m on top of the head. Download a complimentary pdf of our fastener markings chart. Beranda allen bolt grade chart bolt grade chart bolt grade chart pdf bolt torque chart grade 8 hex bolt grade chart metric bolt grade chart nut bolt grade chart shear bolt grade chart stainless bolt grade chart stainless steel bolt grade chart. Approximate equivalency chart metric us roughly equivalent us bolt materials metric nut class sae j429 normally used grades astm grades 4. A short guide to metric nuts and bolts dd thomson engineering. No markings 72 000 65 000 450 62 000 bsw mild steel as 2451 58 015 stainless class 70 30470, 31670 116 000 stainless class 80 30480, 31680 106 000.
Grainger approved fastener tech sheet, grade id boltsnuts. Fastener manufacturers identify the size of a metric fastener differently than an sae fastener. Metric bolt grades and strength calculator to show proof strength, tensile strength, vickers brinell hardness, minimum breaking torque and stress area of metric bolts and screws made of carbon steel and alloy steel with designations 4. Fastener reference tables conversions, hardness, thread pitch, tensile strength the tables below are provided as a general guide to help you better understand metric and imperial measurements. Contact us metric bolt whole sale stainless steel metric. The metric system designates strength capabilities via property classes rather than grades. Reduced shank bolts and screws with coarse thread suppliers1 15 din din 931 1 1987. Looking for grainger approved fastener tech sheet, grade id boltsnuts 5dff6.
The first number represents 1100 of the nominal tensile strength in nmm2. Standards for metric bolts are promulgated by the iso, but adopted by individual nations dimensions. Contact american fastener with any questions or for a custom quote. Metric bolts tightening torques engineering toolbox. Iso metric screw threads are designated by basic diameter and thread pitch. Threaded bolt stress area threaded bolts tensile stress area. From the original jeepl list to the xjlist to the board, a common question comes up time and time again. Sae the main classifications are grades 2, 5, 8, allen heads, and stainless. In addition to the indicated grade marking, all grades, except a563 grades o, a and b, must be marked for manufacturer identification. The chart below shows metric bolt conversions and din numbers for fasteners. Special markings on screw heads and nuts identify the fasteners grade. A short guide to metric nuts and bolts 2 thomson rail. What is the difference between an inches bolt and a metric.
Standard square and hex bolts and screws, ansi b18. Fastener technical data and charts section kl jack. Since millimeters are not an exact fraction of inches, things get complicated fast. The higher the iso numbers are, the stronger the bolt.
Glossary of fastener terms the bolt supply house ltd. Hexagon head bolts grades a and b partially threaded suppliers7 16 din din 931. Bolt depot bolt grade markings and strength chart us bolts head. Nov 19, 20 strength grades for metric fasteners are designated by a symbol comprised of 2 numbers, separated by a decimal. Includes charts that list specifications and tightening guidelines for socket screws as well as charts that. This technical information is supplied as a courtesy. After manufacturing, steel fasteners should be electroplated, zinc with a yellow chromate conversion per astm b633, type ii yellow please refer to table for thickness. Metric fastener size designations start with capital m or mj. Except for the very lowest grades, metric nuts and bolts all carry iden. In metric bolts, strength is described by property classes. I often find new mechanics using standard wrenches and sockets on metric bolts and vice versa. The use of nuts aids in disassembly and reassembly.
Aluminium fasteners, aluminium 6082 nut bolts screws supplier. Us and metric thread sizes mm 10 20 30 40 50 60 70 80 90 100 110 120 140 150 160 170 180. They are available in coarse, fine, and extra fine thread. Bolt grade chart pdf ez read bolt torque chart metric gtsparkplugs are grade 8 bolts more brittle than grade 5 8 8 vs 10 9 metric. Compare tensile strengths of steel grades and class.
Bolt grades i have been on a quite a few online email lists over the last 7 years or so, basically since they first came out. Metric steel bolts grades and property classes metric steel bolts, screws and studs proof and tensile strength. Fastener grade us or class metric refers to the mechanical proper. A hex bolt with metric thread pitch made from medium carbon steel and heattreated. Theres also the question that the thread pitch is measured in pitch millimeters in met. Being that im not much of a math guy unlike like many of the engineering types on this board the simple point to take away might be sae grade 8 150,000 psi tensile strength. This is followed by the bolts nominal diameter and the thread pitch. There are three grades within this specification, 36, 55, or 105.
60 1127 206 744 1508 229 959 1372 738 113 1411 1482 16 20 556 95 1567 889 1460 599 1325 357 105 735 1036 442 1219 1586 1005 789 1034 958 638 1177 2 683 302 535