Titanium Cotter Pins vs Spring Pins
Cotter pins are removable secondary retainers; spring pins are interference-fit components used for location, retention or load transfer. They are not interchangeable even when both are described as pins.
Functional Comparison
| Item | Cotter pin | Spring pin |
|---|---|---|
| Installation | Inserted through a cross-hole and legs spread | Compressed during insertion into a controlled hole |
| Function | Prevents withdrawal of another component | Locates, retains or transfers limited shear load |
| Removal | Normally replaced after removal | Removal and reuse require design validation |
| Critical data | Wire, length, eye, prongs and cross-hole | Free geometry, slot, hole limits and insertion force |
Selection Guide
Choose a cotter pin for a clevis pin, castellated nut or other cross-drilled retention point. Choose a spring pin only when the joint is designed around controlled radial compression and interference. Titanium spring behavior differs from steel, so direct material substitution is not appropriate.
Select From Joint Function
Review Titanium Cotter Pins and Titanium Spring Pins, then send the mating-component drawing and service data.
FAQ
Can a cotter pin replace a spring pin?
No. Cotter pins require a cross-hole and act as secondary retainers; spring pins rely on radial compression in a closely controlled hole.
Can either pin be ordered by diameter alone?
No. Length, form, mating geometry, material condition, function and inspection must also be defined.
Related Reading
Titanium Clevis Pins vs Dowel Pins · How to Specify Titanium Spring Pins