05-12-2013, 11:15 PM
The size is M10 X 1.50. The grade was better than 8 but I don't know the exact spec. At one time 40bob was using 12.9 bolts with his headers
On the stock bolt only, I get the following:
head size is 17mm. Thread spec is 10mm X 1.50
*Over all length is 2.378" inch (all following is in inches)
*Bolt body length (below bolt head) = approx 2.087"
* Length of threads = approx 1.195"
These last 2 specs apply to the studded bolts also.
* the overall length is 3.050"
* the stud length is 0.655", same thread size
All measurements are approx. due to not having the right equipment to make all measurements and piece to piece variation.
On the stock bolt only, I get the following:
head size is 17mm. Thread spec is 10mm X 1.50
*Over all length is 2.378" inch (all following is in inches)
*Bolt body length (below bolt head) = approx 2.087"
* Length of threads = approx 1.195"
These last 2 specs apply to the studded bolts also.
* the overall length is 3.050"
* the stud length is 0.655", same thread size
All measurements are approx. due to not having the right equipment to make all measurements and piece to piece variation.