Pins Spec Table
Pins are small fasteners used for alignment and retention between two components. Dowel pins provide precise location; spring pins use elastic recovery to resist removal; taper pins create a strong wedge-lock fit. Split (cotter) pins are essential for nut retention and must be replaced each time they are removed.
Dowel Pin
Dowel Pin · 7 sizes
Spring Pin
Spring Pin · 6 sizes
Taper Pin
Taper Pin · 6 sizes
Split Pin
Split Pin · 6 sizes
Grooved Pin
Grooved Pin · 8 sizes
Frequently Asked Questions
How do I choose between a dowel pin and a spring pin?
Use dowel pins (knock pins) for precise positioning; use spring pins for simple securing with frequent assembly/disassembly. Dowel pins need h6/h8 tolerance holes; spring pins press into standard drilled holes.
What is the difference between a groove pin and a spring pin?
Groove pins hold via elastic deformation of external grooves; their solid section gives high shear strength. Spring pins have a C-shaped cross-section with lower insertion force and easier removal.
How do you install a split (cotter) pin?
Insert through a hole in the nut or bolt, then bend both legs to prevent withdrawal. Used in safety-critical joints with castle nuts or clevis pins. Reuse is not recommended.