Understanding Metric Fastener Sizes

A metric fastener described as M12 x 60 generally indicates a nominal thread diameter of 12 mm and a stated length of 60 mm, although the way length is measured depends on the fastener head style.

Useful details to send

Include diameter, length, thread pitch if non-standard, head type, grade or stainless class, standard, finish and quantity. A photograph or drawing can help where the exact item is uncertain.

Example RFQ description

Hex bolt, M12 x 60, property class 8.8, zinc plated, DIN 931, quantity 500 pieces.