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Tensile Strength: The maximum load in tension (pulling apart) which a material can withstand before breaking or fracturing. Yield Strength: The maximum load at which a material exhibits a specific permanent deformation.
This chart helps to identify the grades of bolts using the identification marks on the bolt's head along with the strength and hardness of common grade bolts. Please note the bolt heads may also include the manufacturer's identification stamp, especially with high strength bolts.
Strength Requirements by Grade. Tick the boxes to the left of the grade mark to bring up the Compare button. This will reduce the table to the selected grades for easy comparison. Nominal Size (In.) All specifications are ASTM unless otherwise noted.
Grade 7L. Compatible denotes commercially available nut having suitable mechanical properties and dimensional configuration or style which will make it possible to obtain the desired bolt load. Higher strength nuts or nuts of equal strength may be a suitable substitute provided bolt standard allows.
To help you choose the right bolt strength, here is a chart illustrating specifications for different bolt strengths based on their grade or classification: Table 1: US Standard / Imperial System. Table 2: Metric System (with US Standard equivalent)
These alphanumeric designations categorize bolts based on their mechanical properties, such as proof load, tensile strength, and surface hardness. Continue reading as we dive into the basics of bolt grades and their standards, including SAE, ASTM, and metric bolt grades, as well as non-ferrous bolt grades.
Get a quick reference PDF for bolt grades chart and strengths. Find out bolt grades, proof loads, and tensile strengths with ease.