Posted by Mark-IA on August 03, 2018 at 18:15:07 from (67.55.246.108):
In Reply to: Shear bolt posted by 550Doug on August 03, 2018 at 14:44:58:
Grade 2 Bolts
Grade 2 bolts are the most common grade of bolts and are also the least expensive. Grade 2 bolts are found mostly in household fasteners like carriage bolts, and machine screws. The usually have no head marking, but may sometimes contain manufacturer markings.
Grade 5 bolts are commonly found in many automotive applications that call for a hardened bolt but not as brittle as fully hardened. Grade 5 bolts are case hardened, meaning the bolt has been heated enough to hardened the outside of the bolt but not enough to harden the inside portion. Grade 5 bolts are identified by 3 evenly spaced radial lines on the head.
Intense amount of weight or pressure Grade 8 Bolts
Grade 8 bolts are common in heavy manufacturing like large trucks and tractors. They are fully heat treated all the way through which create a bolt that is very hard but somewhat brittle. Because of their hardness, grade 8 bolts are more likely to snap off than bend under extreme loads. Grade 8 bolts are identifiable by 6 evenly spaced radial lines on the head
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Today's Featured Article - The Day Mom Drove the 8N - by Brian Browning. My Dad was wanting to put in a garden but couldn't operate the 8N and handle the old horse drawn plow he had found and rigged up to use with the tractor. Well, he decided to go get Mom out of the house and have her drive the tractor while he walked behind the plow. You got to understand that while my Mom is a hard worker who will always help whenever she can... she had never operated farm machinery before that day. Dad got her out there, explained how the clutch was the same as in our o
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