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How to Identify Grade 5 Nuts Bolts

All bolts and nuts are not created equal. They are made with different properties in order to achieve different strengths. They also have different thread configurations. You need to know what kind of bolt to purchase when you are buying bolts for home use. Grade 5 bolts and nuts are most commonly used on smaller engines and light duty building applications. Bolts and nuts of grade 8 and higher are used on car engines and heavy duty building projects. Bolts and nuts are clearly marked for identification.

Instructions

1

Pick up the bolt and look at the hex end. The hex end is the end on which you place the wrench.

2

Count the number of slashes on the top of the bolt. A grade 5 bolt will have three slashes radiating out from the center in a "Y" formation.

3

Pick up the nut. A grade 5 nut will have a raised or depressed insignia identifying the manufacturer. There will also be three small dashes radiating out from the perimeter.