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Secure your mechanical assemblies with the precision-engineered Ball Pin, a versatile fastening solution designed for demanding applications. This reliable component offers exceptional holding power and easy installation, making it an ideal choice for various industrial and automotive uses. While similar to other fastening pins like the Cotter Pin for securing castle nuts, or the Round Pin for basic alignment, the Ball Pin provides a unique self-locking mechanism. For applications requiring a tight fit in tapered holes, consider the Taper Pin, and for transmitting torque, a solid Pin Shaft is often specified. The Ball Pin stands out with its ability to be quickly engaged and disengaged, offering a reusable and secure fastening method that resists vibration and shock loads.


The Ball Pin is manufactured to the highest standards, ensuring consistency and reliability in every batch. Key features of the Ball Pin include a spring-loaded ball mechanism that snaps securely into place, a hardened steel body for superior strength and wear resistance, and a precision-ground finish for smooth operation. This design allows the Ball Pin to maintain its locking force even under extreme conditions, preventing accidental disengagement. Its versatility makes it suitable for a wide range of industries, from heavy machinery and aerospace to robotics and consumer products, providing a dependable solution for pivot points, linkage assemblies, and quick-release mechanisms.

Ball Pin Technical Specifications

  • Material: High-Carbon Steel / Stainless Steel 304/316
  • Hardness: 45-50 HRC (Hardness Rockwell C)
  • Surface Treatment: Zinc Plated, Black Oxide, or Passivated
  • Ball Retention: Precision Spring-Loaded Mechanism
  • Operating Temperature Range: -40°F to +250°F (-40°C to +121°C)
Part Number Shaft Diameter (Inches) Overall Length (Inches) Ball Protrusion Recommended Hole Tolerance
BP-04 0.125" (1/8") 0.75" 0.030" +0.000 / -0.002
BP-06 0.1875" (3/16") 1.00" 0.040" +0.000 / -0.002
BP-08 0.250" (1/4") 1.25" 0.050" +0.000 / -0.003
BP-10 0.3125" (5/16") 1.50" 0.062" +0.000 / -0.003

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