Holley - 97-321

Holley Harmonic Balancer Bolt - Chevy Big Block - 12-Point

Harmonic Balancer Bolt; For Chevy Big Block 396-454 w/Mid Mount Accessory Drive System; 12 Point; .5 in. Wrench Size; .200 in. Thick Washer; Black;

Replacement harmonic balancer bolt with thick washer for Big Block Chevy Mid-Mount Accessory drive system. 12-Point, 1/2 in. Wrench Size, 1/2 in.-20 x 2.500 in. Under Head Length, Washer diameter 1.5 in. x 0.200 in. Thick.

• 180,000 PSI Rating (Grade 9)
• Made from Steel
• Black E-Coat Finish
• 1/2" Wrench Size
• 12-Point Bolt Head
• Large Diameter Extra Thick Washer - .200" Thick x 1.5" Diameter
• Reusable - Not Torque-To-Yield