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StructX > Design Tables > Bolt Design > Minimum Ultimate Tensile Load

Ultimate Tensile Loads

With so many bolts available these days it is essential to understand the strengths and weaknesses different bolts have when compared to one another. The below table outlines some useful properties that are required for design purposes for some of the more commonly encountered bolt types. If there is any doubt about any of the properties, the manufacturer or supplier should be contacted. When substituting bolts, an engineer should be consulted.

What is Ultimate Tensile Load?

Tensile strength is a measurement of the force required to pull something to the point where it breaks. For bolts, the minimum ultimate tensile load is the maximum amount of tensile force that can be applied along the bolts axis before failure, or fracture.

Metric Bolts - Minimum Ultimate Tensile Load
Nominal Size Pitch (mm) Stress Area (mm2) Class 4.6
(kN)
Class 8.8
(kN)
AS1252
(kN)
Class 10.9
(kN)