Ensure the Fast Plug is FULLY ENGAGED with the box (aka the female-end) when picking up drill pipe. This means the threads are fully inserted and cannot be seen.
To verify the threads are fully inserted, twist the Fast Plug clockwise while it is engaged in the box until it no longer turns.
Safety spring: Keep stretched to 6 inches.
Frequent Cleaning and greasing "inside the taper" is a must.
Keep out of "danger zone" at end of pipe rack (see safety tag).
Keep clean of dirt and mud.
Recommended life of a Fast Plug is 2 years of constant use.