5120-01-053-2637 (20912)
NSN 5120-01-053-2637 (NIIN 01-053-2637) is a socket head screw key set in Federal Supply Class 5120, Hand Tools, Nonedged, Nonpowered — a group of key, socket head screw having different characteristics. Manufacturer part number 20912 (Eklind Tool Co, CAGE 05253); also referenced as 91-S (Eklind Tool Co).
Key specs: fold-up type; full characteristics table below. NIIN assigned December 1977; DEMIL A (none required); export Schedule B 8204.20.0000. Supersedes 5120-01-430-9435 (2003).