ARP 400-3228 5/16-24 x 4.000 Stainless Steel 12-Point Water Pump Pulley Stud Kit

The ARP 400-3228 is a precision-engineered stainless steel stud kit designed for water pump pulley and fan spacer applications. This heavy-duty fastener solution features 5/16-24 thread size with a 4.000-inch overall length, specifically designed to accommodate a 2.750-inch fan spacer while providing secure water pump pulley mounting.

Key Specifications:

• Thread Size: 5/16-24
• Overall Length: 4.000 inches
• Material: Stainless Steel for superior corrosion resistance
• Head Style: 12-point for positive engagement and reduced stripping
• Fan Spacer Accommodation: 2.750 inches
• Application: Water pump pulley mounting with fan spacer

ARP stainless steel fasteners are manufactured from premium 300 series stainless steel alloy, providing excellent resistance to corrosion and oxidation in harsh engine bay environments. The 12-point head design allows for more precise torque application and better tool engagement compared to standard hex heads. This stud kit is ideal for custom cooling system setups, engine swaps, or performance applications where additional fan clearance is required.