Possible Clues:

• Turntable speed fig
• NASCAR no.
• 45, say: Abbr
• Tachometer's meas.
• Spinning speed (Abbr.)
• 33 1/3 or 45, e.g.
• Platter abbr.
• 33 1/3, e.g., for a record: Abbr.
• 33 1/3, e.g.
• Tach abbr.