Wrist Pin Retainer

Wiseco offers a range of performance accessories to help you get your performance rebuild done right, including ring compressors, chamber mold kits, piston components, and more.

Part Type

Engine Piston Wrist Pin Retainer

Product Overview

We have a few choices when it comes to choosing a piston pin. 5115 Material pins are chromium alloy and steel case hardened to 58-64 Rockwell C designed for normal wear and tear. 52100 Material Pins are high carbon chromium-bearing steel made of aircraft quality alloy and case hardened to 54-56 Rockwell C for high load capacity. 9310 Material Pins are high quality low carbon and are case hardened to 59-63 Rockwell C for turbo or nitrous applications.

*5115 Material Pin*
• Standard grade chromium alloy steel
• 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 an aftermarket engine

*52100 Material Pin*
• High carbon, chromium-bearing steel
• Aircraft quality alloy
• Case hardened to 54-56 Rockwell C
• Through hardened
• Ground to a fine finish
• Designed for high load capacity
• Designed for outstanding wear and abrasion resistance

*9310 Material Pin*
• High quality, low carbon, case hardened steel
• Case hardened to 59-63 Rockwell C
• Ground to a superfinish (.025 Ra or better)
• Designed for use in applications which require high surface strength combined with high core toughness
• Excellent to use in applications where high contact stress is combined with high shock and impact loading, such as turbo / nitrous applications

Images are supplied by the manufacturer and may be generic. While all efforts are made to provide accurate pictures, there may be differences in the actual product, such as colour, quantity, version, or included components. Please carefully review the description and specifications for details on inclusions or any variations. Some items may be sold individually or in sets, and images may occasionally depict additional products or quantities not included in your purchase. For assistance or clarification, please contact customer support.

Product Details

Reference Information

Piston Wrist Pin Retainers, Spiro Locks, Carbon Steel, Natural Finish, 1.040 in. Thick, Set of 4

These Wiseco piston lock rings are designed for floating-pin pistons. Engines produced with press-fit pins can be converted to the "floating" type, providing that the piston has provisions for a lock ring retainer. Floating pins are preferred by most serious engine builders.