Service manual

Bolt material grades are shown by numbers punched on the bolt heads_
Prior to tlghtenong. be sure to check out the numbers as shown below:
Punched Number Bolt Material Grade
----------- ---- - ---- ------------ - -- -- - --- --- --------- -----------
None Standard Bolts 5541. 520C
-----------------f--------- ----------- ----------- --------------
7 Special Bolts 543C. S48C (Refined)
-------------- --+--- ---------------- - -- ---------------------1
9 Special Bolts SCM 3. seR 3 (Refinedl
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