[TheForge] Bolt grade

Sat May 11 20:05:01 2002

        You have a grade five bolt.  It is made of a mild carbon steel and
it designed to bend then snap........the grade 8's would be the worst thing
you could put as a shear pin as it hardly bends at all then snaps when it
gets to load.  They are made of higher carbon steel, or alloy steel like
4140 and are heat treated.
        Grade 2 bolts have no markings and are soft to the point they just
bend and stretch before breaking.
        The Grade 2 or 5 would make the best shear pins.  I'd start with a 2
and go to a 5 if it shears to easily.  The hardware store should carry grade
2(no markings) or grade 5 (three markings).

Ralph


----- Original Message -----
From: "evelyn hart" <[email protected]>
To: <[email protected]>
Sent: Saturday, May 11, 2002 7:40 PM
Subject: [TheForge] Bolt grade


> I need some help from some of you bolt experts.  I have a shear bolt that
I
> sheared.  I have been to auto parts places and hardware stores and they
> have not been able to help me.  The auto parts places have grade eight (8)
> and above but nothing to help me.
>
> The head has three (3) marks and a triangle on it.  What grade bolt do I
have?
>
> Bobby Hart
> Hush Puppy Forge
> Griffin, GA
> OBG, AFC
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