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Harmonic Balancer Bolt & Pulley Bolt Kit Fit for Big Block Chevy 366/396/402/427/454 Engines (1965-1972) - Grade 8 Steel Hardware Set

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Product details

Management number 233913173 Release Date 2026/06/27 List Price US$5.40 Model Number 233913173
Category

This heavy-duty bolt kit provides essential hardware fit for Big Block engines (366/396/402/427/454) from 1965-1972. The set includes a Grade 8 steel harmonic balancer bolt (1/2"-20 threads) with matching washer and lock washer. With 1.500" under head length and 3/4" hex head, these bolts offer reliable performance for your engine's harmonic balancer and pulley system.

  • Complete bolt kit - Includes high-grade harmonic balancer bolt, washer, and lock washer for secure installation.
  • Precision fitment - Designed specifically fit for 1965-1972 Big Block engines (366, 396, 402, 427, 454).
  • Heavy-duty construction - Features Grade 8 steel hardware with 1/2"-20 threads for maximum strength and durability.
  • Proper dimensions - 1.500" under head length with 3/4" hex head and 1/4" thick washer for correct fitment.
  • Installation note - May not fit aluminum pulleys - please verify your pulley type before purchase.
ASIN B0F6T3XKR2
Brand HUDEX
Model LSOT001053-A-US5-FBA
Set Name Set
Head Type Hex
Size Name 1/2-20
Metal Type Alloy Steel
Unit Count 1.0 Count
Part Number /
Thread Size 1/2"-20
Thread Type Unc
Drive System Rear-Wheel Drive
Finish Types Painted
Manufacturer HUDEX_DIRECT
Thread Class 3A
Thread Style Right Hand
Fastener Size 1/2"-20 x 1.500"
Fastener Type Hexagon Bolt
Item Diameter 0.5 Inches
Item Hardness Grade 8
Material Type Grade 8 Steel
Exterior Finish Painted
Number Of Items 1
Thread Coverage Fully Threaded
Screw Head Style Hex
Screw Point Style Flat Point
Manufacturer Grade heavy-duty
Included Components A Set of Harmonic Balancer Bolt Kit
Warranty Description 1
Set Screw Thread Type Unified National Coarse (UNC)
Compatible Groove Diameter 1.5 Inches

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