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ARP 190-2502 Square Drive Harmonic Balancer Bolt

(Pontiac GTO 1970, Firebird 1968-77, Grand Prix 1976-77, LeMans 1968-71, 1974-77, Catalina 1967, 1970-72, 1977, Tempest 1968, 1970 + 6 more models)

Part of: ARP Square Drive Harmonic Balancer Bolt

Other options in this family: ARP 134-2503 ARP 145-2503 ARP 120-2502 ARP 135-2503 ARP 180-2502

Manufacturer

Picture for manufacturer ARP

Part Number

190-2502
8 reviews
Sale Price

$36.33

2 left at this price

delivery box

Usually delivered within 2 days

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Product Details

The ARP 190-2502 is an ultra-strong harmonic balancer bolt engineered to withstand the extreme kinetic energy absorbed by the balancer as the crankshaft flexes and twists during engine operation. Rated at 200,000 psi tensile strength, this bolt ensures maximum clamping force to lock the harmonic balancer securely in position.

Key Features:

  • Integrated 1/2 inch square drive forged directly into the bolt head, allowing engine rotation using any standard 1/2 inch drive ratchet or breaker bar
  • Manufactured from heat-treated 8740 chrome moly steel for exceptional strength and durability
  • Heavy-duty black oxide finish for corrosion resistance
  • Extra tall 12-point head accepts deep sockets and eliminates risk of head stripping
  • Includes 1/4 inch thick wide-area washer for optimized load distribution
  • 200,000 psi tensile strength rating ensures reliable clamping under extreme conditions

This square drive design provides the convenience of rotating the engine assembly by hand during installation, adjustment, or maintenance procedures while maintaining the superior strength characteristics ARP is known for in high-performance and racing applications.

Products specifications

Fits

Pontiac GTO 1970, Firebird 1968-77, Grand Prix 1976-77, LeMans 1968-71, 1974-77, Catalina 1967, 1970-72, 1977, Tempest 1968, 1970, Ventura 1974-75, Executive 1970, Grand LeMans 1975-77, Grand Safari 1972, Safari 1968-70, Catalina Ventura 1970

Fastener Finish

Black oxide

Fastener Material

Chromemoly

Fastener Yield Strength (psi)

200,000 psi

Head Style

Square drive

Quantity

Sold individually.

Thread Size

5/8-18 RH in.

Underhead Length (in)

1.580 in.

Washer Included

Yes

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