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Bolt Head Size Finder

Enter the measurement or designation you have. Calcori maps it to the nearest supported standard reference while keeping material and standard families separate.

Mechanical size finders ↗
Language · English (New Zealand)
Likely boltM10
ISO wrench size16 mm
Legacy DIN17 mm

Legacy DIN 931/933 differs from ISO 4014/4017 at selected sizes such as M10, M12, M14 and M22. Reference identification only. Verify the current standard or manufacturer data before purchasing or using the result in a critical application.