__exclusive__: Nas1056

: Designed for use in environments where heat and magnetic interference are concerns, typically used to provide clearance between components in aerospace assemblies. 2. Product Listing (Automotive)

It seems you are referring to — likely a paper, standard, or document code. 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: : Designed for use in environments where heat

Disclaimer: This write-up is for informational purposes. Always consult the official National Aerospace Standard (NAS) technical drawings and your specific aircraft maintenance manuals (AMM) or Structural Repair Manuals (SRM) for exact specifications and allowable substitutions before installation. nas1056