ARP 643-4250 7/16-14 x 4.250 Inch Chrome Moly 12-Point Bolt Kit 5-Pack

The ARP 643-4250 is a premium 5-piece bolt kit featuring heat-treated 8740 chrome moly fasteners designed for high-performance automotive, marine, and powersports applications. Each bolt measures 7/16-14 thread diameter by 4.250 inches under head length (UHL) with a 1.250-inch thread length and 12-point head configuration for superior grip and precise torque application.

Key Specifications:

• Thread Size: 7/16-14
• Overall Length (UHL): 4.250 inches
• Thread Length: 1.250 inches
• Socket Size: 7/16-inch 12-point
• Material: Heat-treated 8740 chrome moly steel
• Finish: Black oxide for corrosion resistance
• Tensile Strength: Nominally rated at 180,000 PSI
• Quantity: 5 bolts with washers included

Performance Features:

• Substantially stronger than Grade 8 hardware with exceptional safety margin
• Precision-rolled threads ensure consistent clamping force and accurate torque readings
• 12-point head design allows for easier access in tight spaces and reduced chance of rounding
• Black oxide coating provides rust and corrosion protection
• Perfect for differential covers, driveline components, suspension mounting, and custom fabrication

ARP fasteners are manufactured from premium-grade materials and heat-treated to exacting standards, making them the preferred choice for professional engine builders, racers, and automotive enthusiasts who demand reliability and consistent performance under extreme conditions.