AXLETECH KING PIN BOLTS

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Item #10 on the Parts Breakdown

With a tensile strength of 170,000 psi, these alloy steel screws are stronger than Grade 8 steel screws. 

Black-oxide steel screws are mildly corrosion resistant in dry environments. Fine and extra-fine threads are closely spaced to prevent loosening from vibration; the finer the thread, the better the resistance. They are not compatible with coarse threads.