Morris New member Messages 1 Dec 27, 2019 #1 What does 8.8 mean on a metric bolt? Should I be using 10.9s or 8.8s to work on my newer equipment?
IH tractorman Farm Hand Messages 22 Feb 20, 2020 #2 that is the hardness I don't know the spec, but I think around a grade 5 for 8.8, grade 8 for 10.9
oldihdsl New member Messages 2 Feb 23, 2020 #3 Morris said: What does 8.8 mean on a metric bolt? Should I be using 10.9s or 8.8s to work on my newer equipment? Click to expand...
Morris said: What does 8.8 mean on a metric bolt? Should I be using 10.9s or 8.8s to work on my newer equipment? Click to expand...
oldihdsl New member Messages 2 Feb 23, 2020 #4 Hardness. 10.9 is harder than a 8.8. A bolt used in a pulley will run longer theorticaly where as a 10.9 will be used when cost is a factor or strength is a primary consideration. You would not want to use a $10.00 bolt in a $5.00 apl.
Hardness. 10.9 is harder than a 8.8. A bolt used in a pulley will run longer theorticaly where as a 10.9 will be used when cost is a factor or strength is a primary consideration. You would not want to use a $10.00 bolt in a $5.00 apl.