Description Replacement harmonic balancer bolt with thick washer for Small Block Chevy Mid-Mount Accessory drive system. 12-Point, 7/16" Wrench Size, 7/16"-20 x 2.800" Under Head Length, Washer diameter 1.5" x 0.200" Thick. 180,000 PSI Rating (Grade 9) Mad
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Replacement harmonic balancer bolt with thick washer for Small Block Chevy Mid-Mount Accessory drive system. 12-Point, 7/16″ Wrench Size, 7/16″-20 x 2.800″ Under Head Length, Washer diameter 1.5″ x 0.200″ Thick.
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