Ford Cleveland 302 351 & Holden V8 253 308 304 Harmonic Balancer Bolt

Aeroflow Harmonic Balancer Bolt for Ford Cleveland & Holden V8

Engineered for Ford V8 Cleveland 302/351 and Holden V8 253/308/304 engines, this Harmonic Balancer Bolt delivers a precise, high‑strength fastening solution for secure balancer installation and routine service.

• Material and strength: Aircraft‑quality 8740 high‑tensile chromoly steel, cold‑forged to ensure molecular integrity within the stud, rated up to 190,000 psi—stronger than Grade 8 and OEM fasteners.
• Head and drive: 12 Point Head with a high hex head design to help prevent socket slippage during engine rotation and servicing.
• Thread, size, and fit: 5/8-18" thread; 5/8" spanner size; sold individually.
• Torque specification: Tighten to 110 ft‑lbs (149 Nm) for accurate, uniform balancer seating.
• Dimensions: Overall length 65.95 mm; under head length 45.90 mm; head diameter 23.60 mm; shank diameter 9.30 mm; shank length 8 mm.
• Washer details: Ground washer outside diameter 49.8 mm; inside diameter 16.1 mm; thickness 7.05 mm; extra thick washer included to promote precise, consistent torque.
• Compatibility: Designed to suit Ford 351 Cleveland and Holden V8 engines with a harmonic balancer.