We will explain and define all the values such as diameter of a bolt, head and wrench size.
Multiply the first number which is the bolt size in inches or millimeters, by 1.5 using a pocket calculator, if necessary. Read the size number given on the bolts' package, if you just purchased them.
For example, it may read: 1/2 - 10 UNC - 2A x 1 3/4. Which wrench you do need for a specific bolt? Please read AddThis Privacy for more information. Metric Bolt Head/Wrench Size. We don't save this data. Head and wrench size US bolts: 1 in = 25.4 mm ANSI/ASME B18.2.1 Square, Hex, Heavy Hex, and Askew Head Bolts and Hex, Heavy Hex, Hex Flange, Lobed Head, and Lag Screws (Inch Series) Sorry to see that you are blocking ads on The Engineering ToolBox! For example, for the numbers in Step 1, 1/2 x 1.5 = .75 or 3/4, which is the wrench size needed for this standard-sized bolt. We checked the values in the chart 3 times and we guarantee you their accuracy. Try different wrench sizes until you find the one that fits snugly around the bolt's head, if you do not have immediate access to a vernier caliper or a calculator. ANSI/ASME B18.2.1 Square, Hex, Heavy Hex, and Askew Head Bolts and Hex, Heavy Hex, Hex Flange, Lobed Head, and Lag Screws (Inch Series). Follow the instructions in Step 2 to find the wrench size to use for this bolt. Engineering ToolBox - Resources, Tools and Basic Information for Engineering and Design of Technical Applications! The force acting in the lubricated bolt can be calculated as For example, for the numbers in Step 1, 1/2 x 1.5 =.75 or 3/4, which is the wrench size needed for this standard-sized bolt. This will save you time when making repairs on your car or any piece of equipment. Only emails and answers are saved in our archive. The answer varies and you will need a long table to get all the information needed. Print this page .
Bolt Diameter (mm) Head/Wrench Size (mm) …
Head and wrench sizes are divided on hex bolts, lag bolts and square bolts. These applications will - due to browser restrictions - send data between your browser and our server. Head and wrench sizes are divided on hex bolts, lag bolts and square bolts. Always double check and make sure you didn’t make a mistake. US Bolt Head/Wrench Size. Either way, you have some practical methods at your disposal to determine the wrench size for a given bolt. We will explain and define all the values such as diameter of a bolt, head and wrench size. Print this page . Eliminate as much play between the wrench and the bolt's head as possible to prevent damage to the bolt as you tighten or remove it. This article was written by the It Still Works team, copy edited and fact checked through a multi-point auditing system, in efforts to ensure our readers only receive the best information. Cookies are only used in the browser to improve user experience. The proof load for a M30 metric bolt grad 8.8 is 337000 N. The torque required to achieve this force with a dry bolt is calculated to 2022 Nm. If you want to promote your products or services in the Engineering ToolBox - please use Google Adwords. We don't collect information from our users. eval(ez_write_tag([[300,250],'garagesanctum_com-medrectangle-3','ezslot_0',104,'0','0'])); GarageSanctum is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to amazon.com.
Measure the distance across the flats of the bolt's head using a vernier caliper if the bolt is installed in your vehicle or on a piece of equipment. Step 3 Following formula are used to calculate spanner size – For bolt size upto M14 Spanner Size = (Bolt Size * 1.5) + 1 Example for M12 bolt, Spanner Size = (Bolt Size * 1.5…
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