Nas1831 - Standoffs

(Note: If you were indeed looking at a part labeled specifically "NAS1831" without a dash, it is likely a misprint or a specific manufacturer’s internal part number based on the NAS183-1 Class standard.)

I must clarify that I could not locate a widely recognized technology, engineering standard, military specification, or historical event specifically labeled nas1831 standoffs

The NAS183 consists of two parts that screw together: (Note: If you were indeed looking at a