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?

 

i wouldn't skimp get grade 8

 

Has to do with strength and all that good stuff that is useful to keeping things together. Go 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

 

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.

 

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.

 

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