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Workshop reference

Metric Spanner Size Chart

Common ISO metric hex fastener across-flats sizes.

FastenerSpanner size
M35.5 mm
M47 mm
M58 mm
M610 mm
M813 mm
M1017 mm
M1219 mm
M1624 mm
M2030 mm
M2436 mm

Reference values are general. Confirm the specification, standard and material required for the actual job.