Stratocaster Tremolo / Whammy Bar Chrome M6 Thread

Arm Diameter: about 5mm

Screw Thread Diameter: about 5.85mm (M6 thread)

Fits Most Squiers and most asian import Strats or aftermarket bridges with M6 threaded trem arms, not Mexicn Strats, or other import Strats with smaller threaded bridges, please make sure you measure yours before ordering. We sell the M5 whammy bars too.

As a rule of thumb here’s a good sizing reference:
All USA strats: 10-32 UNF [equivalent 4.82mm]
All Made in Mexico and Made in Japan: M5 [4.80mm thread]
Squier Classic Vibe and Affinity- M5 [4.80mm thread]
Squier Bullets, Deluxes and Standards are usually M6 [5.80mm thread] but sometimes M5
Generic Imports Brands are often M6 [5.80mm thread] but sometimes M5

If you are unsure you can always try an M5 or M6 bolt from a hardware store first, to check the thread of your tremolo/vibrato unit.