Polished to a mirror finish. Custom 450 stainless steel. Groove kits contain recessed flange washers. 12-Point bolts have 180,000 psi tensile, which is 20% stronger than Grade 8. UNJ3A rolled threads. Made in the USA.
Recommended for the Diamond Engineering PB517S Crankcase12-Point Polished Stainless Engine Bolt KIt
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