AEROFLOW PERFORMANCE HARMONIC BALANCER BOLT [HOLDEN V8 RED/BLUE/BLACK/INJECTED MOTOR]

AEROFLOW PERFORMANCE 8740 GRADE HARMONIC BALANCER BOLT
12 POINT HEAD
HOLDEN V8 253 4.2L & 308 5.0L RED/BLUE MOTOR
HOLDEN V8 304 & 308 5.0L BLACK MOTOR
HOLDEN V8 304 5.0L INJECTED MOTOR
HOLDEN V8 355 5.7L STROKER MOTOR (348ci)

HOLDEN V8 RED/BLUE/BLACK MOTOR
05/1969-1984 HOLDEN [HT-HG-HQ-HJ-HX-HZ-WB SERIES]
03/1974-03/1978 HOLDEN [LH-LX TORANA]
10/1978-08/1988 HOLDEN [VB-VC-VH-VK-VL COMMODORE]

HOLDEN V8 INJECTED MOTOR
03/1989-1999 HOLDEN [VN-VP-VR-VS-VT COMMODORE]
03/1990-1999 HOLDEN [VQ-VR-VS STATESMAN/CAPRICE]
09/1990-2000 HOLDEN [VG-VP-VR-VS UTE]

The Aeroflow harmonic balancer bolt is designed to suit Holden V8 engines. Manufactured from aircraft quality 8740 high tensile strength chromoly steel and cold-forged to ensure molecular integrity within the stud.

Meaning these are rated up to 190,000 psi making them stronger than Grade 8 and OEM fasteners. They feature a high hex head to prevent socket slippage while rotating the engine during assembly or routine service inspections. An extra thick, parallel ground washer is provided to allow for a more accurate, uniform torque.

SPECIFICATIONS:
THREAD SIZE : 5/8"-18
OVERALL LENGTH: 65.95MM
UNDER HEAD LENGTH: 45.90MM
HEADDIAMETER: 23.60MM
SHANK DIAMETER: 9.30MM
SHANK LENGTH: 8MM

WASHER OUTSIDE DIAMETER: 49.8MM
WASHER INSIDE DIAMETER: 16.1MM
WASHER THICKNESS: 7MM

IMPORTANT NOTE:
TIGHTEN BOLT TO HOLDEN SPECIFICATIONS