Nas1056
It seems you are referring to — likely a paper, standard, or document code.
Based on common aerospace and military specifications, stands for National Aerospace Standard (originally National Aircraft Standard). nas1056
A quick check of the NAS catalog shows that is not one of the most frequently cited standards (like NAS1835 for bolts or NAS1149 for washers). However, here is the most probable match: It seems you are referring to — likely
It seems you are referring to — likely a paper, standard, or document code.
Based on common aerospace and military specifications, stands for National Aerospace Standard (originally National Aircraft Standard).
A quick check of the NAS catalog shows that is not one of the most frequently cited standards (like NAS1835 for bolts or NAS1149 for washers). However, here is the most probable match: