Grade 8 vs Grade 43 bolts?? - Ranger-Forums - The Ultimate Ford Ranger Resource


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Old 02-19-2009
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Grade 8 vs Grade 43 bolts??

What's the difference in grade 8 & grade 43 bolts??
....Other than the 8's are gold & 43's are green.

Both hardware stores here only have grade 8 (well they had a few grade 5 bolts), but TSC only had grade 43.

From what I've read, grade 8 has greater tensile strength than grade 5, but I couldn't seem to find much info on grade 43.

TSC only had grade 43 & from their signage, were all $2.95 a pound.

I already have everything I need in grade 8, but I had to pay about $1.75 for a single 1/2" dia x 1 1/2" long bolt & nut.

What's the grade 43 stuff suitable for?
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Old 02-19-2009
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i wouldn't skimp get grade 8
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Old 02-19-2009
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Has to do with strength and all that good stuff that is useful to keeping things together. Go grade 8.
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Old 02-19-2009
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Quote:
Originally Posted by Downey View Post
i wouldn't skimp get grade 8
That didnt anwer his question at all, nice try thnks bye


To the OP
This is the most detailed I could find, They say it is a grade 9 metal, heat treated etc.

http://http://www.fatbmx.com/modules...p?storyid=2285
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Old 02-19-2009
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Found this too

http://en.wikipedia.org/wiki/Screw

Gradings are indicated as markings, while grade 0 is the lowest, grade 10 is the highest. Here is the sequence of bolt strength and markings, from least to most. Grade 0, 1 and 2 bolts have no markings, grade 3 has 2 radial lines, grade 5 has 3, grade 6 has 4, grade 7 has 5, grade 8 has 6, grade 9 has 7, grade 10 has 8.
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Old 02-20-2009
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I've never heard of Grade 43s at normal hardware stores. If anything, they are some super alloy i guess...really strong?? IDK, my work only has upto grade 8 and they go for anything we'd ever need really.
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Old 02-20-2009
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Bolts with designations like "Grade 5" or "Grade 8" are rated on the SAE scale. There is no such thing as a Grade 43 bolt on the SAE scale.

What they are probably referencing at TSC is the class of material that is used to make the bolts - Grade 43 carbon steel. The ASTM spec that includes Grade 43 is usually used to rate chains and structural steel, not bolts. If I had to guess at a rough equivalent for "Grade 43 bolts", I'd say something like SAE Grade 2 or possibly SAE Grade 5. Also, the bulk price of $2.95 a pound should be a tipoff that "Grade 43 bolts" are nothing special.
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Old 02-23-2009
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Originally Posted by rwenzing View Post
Bolts with designations like "Grade 5" or "Grade 8" are rated on the SAE scale. There is no such thing as a Grade 43 bolt on the SAE scale.

What they are probably referencing at TSC is the class of material that is used to make the bolts - Grade 43 carbon steel. The ASTM spec that includes Grade 43 is usually used to rate chains and structural steel, not bolts. If I had to guess at a rough equivalent for "Grade 43 bolts", I'd say something like SAE Grade 2 or possibly SAE Grade 5. Also, the bulk price of $2.95 a pound should be a tipoff that "Grade 43 bolts" are nothing special.
Wow Bob is the man
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