Wiseco S720 Piston Pins & Locks – 5115, 52100 & 9310 Steel Options

The Wiseco S720 Piston Pins & Locks are precision-engineered wrist pins designed to meet the demands of high-performance, aftermarket, and forced-induction engine builds. Wiseco offers three distinct pin material grades, allowing builders to select the optimal pin for their specific power level, application, and durability requirements.

5115 Material Pin – Standard High-Performance Grade

• Standard grade chromium alloy steel construction
• Case hardened to 58–64 Rockwell C
• Ground to a surface finish of .15 Ra or better
• Designed to withstand the normal wear and tear of a high-performance aftermarket engine build

52100 Material Pin – High Load Capacity Grade

• High carbon, chromium-bearing steel – aircraft quality alloy
• Case hardened to 54–56 Rockwell C and through hardened
• Ground to a fine finish for precise fit
• Engineered for high load capacity with outstanding wear and abrasion resistance

9310 Material Pin – Turbo & Nitrous Grade

• High quality, low carbon case-hardened steel
• Case hardened to 59–63 Rockwell C
• Ground to a superfinish of .025 Ra or better
• Engineered for applications requiring high surface strength combined with high core toughness
• Ideal for high contact stress environments with shock and impact loading — including turbo and nitrous applications

Each Wiseco piston pin is manufactured to exacting tolerances, ensuring proper fit, reliable sealing, and long service life across street performance, road racing, drag racing, and forced-induction applications.