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Inch and metric Materials, Mechanical Properties and Markings

 

Materials, Machanical Properties and Markings
Grade 5 Grade 8 Class 8.8 Class 10.9 L9 Grade 5 Grade 8 Class 8 Class 10
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Coarse & Fine Thread Pitches
Inch   Metric
Coarse Fine   Coarse Fine
1/4-20 1/4-28   M6x1.00 M6x0.75
5/16-18 5/16-24 M8x1.25 M8x1.00
3/8-16 3/8-24 M10 x 1.50 M10x1.25
7/16-14 7/16-20 M12x1.75 M12x1.50
1/2-13 1/2-20 M14x2.00 M14x1.50
9/16-12 9/16-18 M16x2.00 M16x1.50
5/8-11 5/8-18 M20x2.50 M20x1.50
3/4-10 3/4-16 M22x2.50 M22x1.50
7/8-9 7/8-14 M24x3.00 M24x2.00
1-8 1-14 M27x3.00 M27x2.00
1 1/8-7 1 1/8-12 M30x3.50 M30x2.00
1 1/4-7 1 1/4-12 M36x4.00 M36x2.00
1 3/8-6 1 3/8-12 M42x4.50 M42x2.00
1 1/2-6 1 1/2-12 M48x5.00 M48x2.00
Tensile Strength Comparison

Imperial (Grades) - Ibf/in² (PSI)

Metric (Classes) - Mpa (N/mm²)

 tensilestrengthcomparison.png
Accurate Conversion Factors
* 1000 PSI (Ibf/in²) = 6.8948 Mpa * 1 Mpa = 145,038 PSI (Ibf/in²)