Why Small Burrs Cause Big Problems with locking system pins

https://diesel-parts-journal.solsticebrief.com/posts/a-practical-guide-to-tapered-threaded-nipples-for-oem-teams

Why Small Burrs Cause Big Problems with locking system pins An OEM part can appear simple on a drawing and still carry a demanding job. Locking system pins are used in industrial lock mechanisms