Why can't a 25K Apex fitting with spacer or donut ring be used as a POA for a UH-60 series aircraft?

The reason a 25K Apex fitting with a spacer or donut ring cannot be used as a Point of Attachment (POA) for the UH-60 series aircraft is due to its inability to be jettisoned. Jettisoning is a critical safety feature during sling load operations; should an emergency arise, the ability to quickly release the load can be essential to the safety of the aircraft and crew. If an attachment point cannot be safely jettisoned, it poses a risk during flight, particularly in situations that require immediate action.

While factors like weight and safety testing are important in other contexts, the specific requirement for jettison capability distinguishes this choice as the deciding factor for using a given fitting as a POA.