Half Inch Diameter Four Inch Long Roll Pin Spring Pin Tension Pin For Rotating Shafts Built Tough Heat Treated Spring Steel With Black Finish Durable Heavy Duty Pin For Mechanical Projects

Heavy-Duty 1/2 in x 4 in Roll Pin for Shafts (Single)
✔️ 1 pc, 1/2 in dia, 4 in length; heat-treated spring steel

These half-inch diameter, four-inch long roll pins are designed for secure axial retention on rotating shafts and similar assemblies. Built from heat-treated spring steel with a black finish, they resist wear and side-load stress in automotive, marine, and industrial applications.

✅ 1/2 in (12.7 mm) diameter, 4 in (101.6 mm) length
✅ Heat-treated spring steel with black finish for durability
✅ Secure axial retention under side-load conditions on pulleys, gears, and collars
✅ Ideal for cars, boats, home and industrial projects

💡 What is a roll pin used for securing rotating shafts and mechanical assemblies?

A handy fastener that keeps parts aligned and held tight. - Axial retention for pulleys, gears, and couplings - Handy for quick assembly and disassembly - Resists movement under moderate side load when properly sized