Lock includes flat key, single toothed edge for wall mount NSM jukeboxes - this may be for a cash box door...

Dimensions: Thread length is ~15mm, threaded diameter is 20mm, double-D notch.

Last one...

NSM Lock & Key data:

• NSM Key #009901 - CD Fire, Firebird Wall Models and Possibly Others - Flat key, single toothed edge for lock 206676
  
• NSM Key #2H0010 - ES160, Prestige 160, Festival, Prestige 2, City II, City IV, Satellite 200)
• NSM Key #?? (For City CD Combi, Gem. cosmic Blast, Perf Grand Series)
• NSM Key #2C2608 - Performer Grand 2000)
• NSM Key #167676 - Festival ES 160, 240I
  
• NSM Key #3975 Tubular Style for: FireBird I, Fire Country, FireBird II, Old Fashion Wizard, Performer Wall, Solid Gold, Digital Thunder, Digital Thunder Wall, Performer Grand 2000, Performer Wall 2000, Emerald Ice