Flex-disc (guibo) to driveshaft torque spec: How do I find what grade bolt I have?

[Epsilon]

Looking at BJ's torque specs for the guibo to driveshaft, the torque spec depends on the grade type bolt that you have (8.8, 10.9, 12.9):

https://thebuildjournal.com/tech-gui...ue-spec-guide/

Transmission	Flex-disc (guibo) to driveshaft or transmission flange (8.8 grade)	M10	35	48
Transmission	Flex-disc (guibo) to driveshaft or transmission flange (10.9 grade)	M10	44	60
Transmission	Flex-disc (guibo) to driveshaft or transmission flange (12.9 grade)	M10	74	100

Anyone know how to identify bolt grade?

[nahvkolaj]

The bolts have it stamped on the head. Yours are 10.9

[Epsilon]

Thanks bud! My eye saw that "9" as "g" and my brain thought the bolts are 10 grams. lol