Metric Castle Nut

What is a Metric Castle Nut?

Metric Castle nut is a hex nut with slots on top of hex which resemble the parapet of a medieval castle that aligns with holes in bolt or shaft to accept the insertion of a cotter pin, available in most larger sizes over M12[1/2] our sizes range from M14 X 1.50 – M64.

To order please phone 01243 551484 or email

or click the link below to view our full stock range.…/metri…/metric-castle-nuts/