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View Full Version : Is this a grade six or nine bolt?

Nowhere
08-20-2006, 01:07 PM
I've searched, can't find..

Help?
Nowhere
08-20-2006, 01:12 PM
metric.......
jstandle
08-20-2006, 01:18 PM
http://www.boltdepot.com/fastener-information/Bolt-Grade-Chart.aspx
Nowhere
08-20-2006, 01:23 PM
Seen it...


They don't specify a straight 6 or 9 metric grade bolt..

I don't know if the hash means 6 or 9....

Thinking of card games, the hash or _ is at the bottom...

h3lp!
KWTMECH
08-20-2006, 02:21 PM
Well 8.8 is comparable to a g5 and 10.9 is about the same as gr8
Travis Waldher
08-20-2006, 02:59 PM
Never seen a "6" on a bolt.

It *could* be a grade 8. Grade 8 = 6 hash marks
Etcetera
08-20-2006, 03:39 PM
I vote a short way of saying 10.9. Just

.
9

Is the bolt metric or standard?
Nowhere
08-20-2006, 03:55 PM
I vote a short way of saying 10.9. Just

.
9

Is the bolt metric or standard?

It's a 12mm metric...

I've got some samurai bolts that have a 10, 7, or a 5 on them.. No " . " on them at all..

Hmph..

Thank you all for your input..

I can snap a picture if anyone wants?
85blue4runner
08-21-2006, 08:38 PM
no such thing as a grade 9 bolt.

http://www.engineershandbook.com/Tables/boltgrades.htm
Kartracer55
08-21-2006, 09:42 PM
take a picture...

I dont think its traditional metric grading because the "X.Y" on a metric bolt give info about the strength.
Travis Waldher
08-21-2006, 10:14 PM
well, I'll be damned, there is such thing as a grade 6

http://www.sizes.com/tools/bolts_SAEtork.htm

I would expect the "." under the "6" to tell you it's a "6" and not a "9".
ZJim
08-22-2006, 09:12 AM
I think those markings mean you oughta throw it away and find something you KNOW is up to the task! :D
Travis Waldher
08-22-2006, 10:49 AM
ok, what did the bolt come off of?
85f150dsel
08-22-2006, 12:11 PM
from my experience alot of my older dirt bikes that are japenese have smaller metric bolts that have had 6 or 7's like that cast on the head of it like that
anvil
08-22-2006, 04:01 PM
no such thing as a grade 9 bolt.

http://www.engineershandbook.com/Tables/boltgrades.htm
Really?

http://www.grainger.com/Grainger/wwg/guideBrowseMatches.shtml
http://www.hillcofasteners.com/Products.asp?CategoryID=118
85blue4runner
08-31-2006, 05:08 PM
and I am sure that I would take the word of Hillco Fastener company over that of the ASTM (American Society for Testing & Materials) :flipoff2:
njonl
08-31-2006, 06:38 PM
I work at Fastenal. We sell several different sizes of Grade 9 bolts :flipoff2: