HOW TO DETERMINE BOLT SIZE
There are a number of power bolts available. The first thing you need to do is determine which Power Bolt is suitable to your application. In order to do this you need to know the size and thread pitch of the bolt required. Below is a step by step guide to assist you in determining the bolt size and thread pitch to suit you needs.
Please note: At present AutoStuff offers only Metric thread bolts as found on Australian, Japanese, Korean and Chinese vehicles along with many other manufactures working with the metric system. If you have an American or British built vehicle it may have imperial thread fasteners. In this case you will need to contact us via email to arrange a "Special Order" Power Bolt.
The following instructions cover step by step the procedure to identify the size and thread pitch of your metric bolt.
1. Remove the existing bolt from the location you wish to install a power bolt.
2. Determine the bolt diameter you require. This measurment is known as the "M" measurment and is measured in milimeters. The most common sizes you will find are M8, M10 and M12. To measure your bolt simply measure from one side of the bolt to the other as shown.
3. Determine the thread pitch of the bolt. Thread pitch is determined by measuring the distance in millimeters between adjacent threads on the bolt. In order to get an accurate reading it will be necessary to count the distance in millimeters between 10 threads then divide this number by 10 as shown.
The most common thread pitches are 1.0, 1.25 and 1.5. Therefore Dimension "X" should be 10mm, 12.5mm or 15mm. If it is something else please contact us for assistance.
4. Using This information now determine the bolt you require by linking the two pieces of information together. First start with your "M" number then add the thread pitch. In this example the "M" value is 12mm and the pitch is 1.5mm therefore the bolt is an M12*1.5