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Re: HEX BOLT Question

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Posted By<" ">Neil Moran on March 17, 2002 at 09:56:53:

In Reply to: HEX BOLT Question posted byNew Girl on March 16, 2002 at 18:25:02:

Hi New Girl,

Not sure about the M E or the P M, but the 8.8 is the strength grade of the bolt, 8.8 being a high tensile bolt.
Bolt grades vary from about 4.6 - ordinary bolts up to about 14.9 - socket head capscrews and the like.
The figures work like this - (for say an 8.8 bolt)

The first figure (x 100)is the Ultimate Tensile Strength of the material in N/mm^2 i.e. 800N/mm^2
The first figure multiplied by the second figure (and x 100) is the minimum Yield Strength in N/mm^2 i.e. 640N/mm^2

Hope this helps,
Neil Moran

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