SKU: 69036135052

Holley Harmonic Balancer Bolt - Chevy Big Block - 12-Point 97-321

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Description

Holley Harmonic Balancer Bolt - Chevy Big Block - 12-Point 97-321Replacement Harmonic Balancer Bolt with Thick Washer, for Chevy Big Block 396 454 with Holley Mid Mount Accessory Drive System 20 242 & 20 242BK Replacement harmonic balancer bolt with thick washer for Big Block Chevy Mid Mount Accessory drive system. 12 Point, 1 2" Wrench Size, 1 2" 20 x 2. 500" Under Head Length, Washer diameter 1. 5" x 0. 200" Thick. NOTES: Torque Harmonic Balancer Bolt to 85 ft lbs. Features: 180,000 PSI Rating (Grade 9) Made from

Replacement Harmonic Balancer Bolt with Thick Washer, for Chevy Big Block 396-454 with Holley Mid-Mount Accessory Drive System 20-242 & 20-242BK

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

NOTES: Torque Harmonic Balancer Bolt to 85 ft/lbs.

Features:

  • 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

Specs:

Bolt Grade 10.9
Brand Holley
Color Black
Emission Code 6
Engine Chevy Big Block V8
Finish Black E-Coat
Grade Type Performance
Head Drive Type 12 Point
Head Style 12-Point
Length 2.5Inch
Material Steel
Product Type Harmonic Balancer Bolts
PSI Rating 180,000
Reusable Yes
Thread Diameter 1/2Inch
Thread Pitch 20
Thread Size 1/2-20
Under Head Length 2.500"
Universal Or Specific Fit Universal
Washer Included Yes
Washer Size .200" Thick x 1.5" Diameter
Wrench Size 1/2"
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SKU: 69036135052

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2020Shoper
Alexandria, US
★★★★★ 1
Description is misleading
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The description states that the book includes the access code. That is not true, the access code has been used and publisher is not honoring coffee
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Reviewed in the United States on April 24, 2026
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Book as advertised
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Book as advertised
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KenzieCoop
Omaha, US
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good quality
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Good quality book. Bought for NP school.
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Denise
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Reviewed in the United States on October 12, 2025
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Good condition
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