NAS

Screw, Machine-Flat Fillister Head, Full Thread, Tri-Slot Recess, Alloy Steel, Self-Locking and Nonlocking
Data Sheet by Aerospace Industries Association - National Aerospace Standard, 07/15/1994

Screw, Shear, 130 Deg Flush Head, Close Tolerance, Self-Locking and Non-Locking, NAS 1800 Six Lobe Recess, 95 KSI FSU
Data Sheet by Aerospace Industries Association - National Aerospace Standard, 10/31/2012

SCREW, SHEAR, FLAT FILLISTER HEAD, CLOSE TOLERANCE, SHORT THREAD, NAS1800 SIX LOBE RECESS, 95 KSI FSU
Data Sheet by Aerospace Industries Association - National Aerospace Standard, 07/01/2006

SCREW, SHEAR, 100 DEG FLUSH HEAD, CLOSE TOLERANCE, SELF-LOCKING, NAS1800 SIX LOBE RECESS, 95 KSI FSU
Data Sheet by Aerospace Industries Association - National Aerospace Standard, 05/31/2012