2003 Toyota Corolla Metric bolt head markings

2003 TOYOTA COROLLA
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CARGO
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2003 Toyota Corolla

What does the two slash markings (II) on the heads of the four metric rear axle hub & bearing assembly bolts indicate. Those don't seem to be standard markings for metric bolts.
Thanks
Sep 8, 2009 at 12:31 PM
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MMPRINCE4000
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Not a standard metric mark.

Metric bolts have the strenght stamped on the head, 8.8, 9.8,10.9,11.9.12.9.

Studs have a cross + stamped on them.

If replacing suspension bolts M8x1.25 or larger use at least a 10.9 bolt strength.
Sep 9, 2009 at 5:34 AM