Please, check Bolt grade is supposed to be Grasde 8.8, but not Grade 8.
Regards,
On Tue, Nov 24, 2009 at 6:56 AM, Joseph R. Grill <jrgrill@cableone.net> wrote:
> Harold,
>
> Thank you for the links.
>
> Joe
>
>
>
> From: Harold Sprague [mailto:spraguehope@hotmail.com]
> Sent: Monday, November 23, 2009 3:18 PM
> To: seaint@seaint.org
> Subject: RE: Grade 8 bolt properties
>
>
>
> Joe,
>
> Contact the IFI regarding the MSCR.
> http://www.industrial-fasteners.org/contact_us.html
>
> You need to page through the NASA RS 1228
> http://gltrs.grc.nasa.gov/reports/1990/RP-1228.pdf
>
> It has a good section in the back regarding ASTM and SAE.
>
> Regards, Harold Sprague
>
>
>
>
> ________________________________
>
> From: jrgrill@cableone.net
> To: seaint@seaint.org
> Subject: Grade 8 bolt properties
> Date: Mon, 23 Nov 2009 11:22:04 -0700
>
> I am working on a small project. Kind of a backwards design for some small
> steel brackets that are in the process of being detailed. The drawings the
> steel detailer call for Grade 8 1/4x20 bolts. I have found some
> information on the internet. What I think should be called out should be
> ASTM A354 Grade BD (it appears that it is in the same category as SAE J429
> Grade 8). It has a yield strength of 130 ksi and a tensile strength of 150
> ksi. Am I correct?
>
>
>
> In addition, the shop drawings that are in production, call for a ¼"-20 FH
> MSCR in another application on the project. I can see that it will be a ¼"
> flat head screw (the drawings show a countersunk part for the application
> and I believe the receiving part will be drilled and tapped. But what does
> the "MSCR" stand for? Sorry for the confusion here. And, what would the
> correct ASTM designation be? Same as above for the bolts as the table I
> found from American Fastener shows ASTM A#%$ Grade BD being for Bolts,
> Screws, and Studs.
>
>
>
> Thanks for the help
>
>
>
> Joe Grill
>
>
>
>
>
>
>
> ________________________________
>
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