What wrench fits a M24 bolt?

Across-flats wrench/socket size by head type - a flange bolt often uses a smaller wrench than a standard hex bolt of the same diameter, so always check the head type.

System

Bolt size

Nominal diameter	24 mm
Standard hex	36 mm
Hex flange	32 mm
Recommended clearance hole (medium fit)	26 mm
≈	≈ 1-1/2" (1")

Reference values only - always verify against the actual part before machining, tapping or tightening anything.