Castle Nuts (DIN 935)

Castle Nuts are made to DIN 935 and are often used alongside a bolt or a threaded rod that feature a pre-drilled hole, where a cotter pin can be used to secure the fixing and prevent movement.

These locknuts are also referred to as a ‘Castellated Nut’, and are ideal for use in applications where vibrations may undo a fixing.

Sometimes incorrectly, they are referred to as Slotted Nuts. Castle Nuts are a different fastener altogether. They visually look more like a Hex Nut and host protruding triangular portions, where as a Slotted Nut (pictured below), looks as though a Hex Nut has been cut with the slots and corners forming part of the protrusion.

This is a slotted nut.

Castle Nuts are generally manufactured in Steel or Stainless Steel, with other materials also available.

They are available in a range of sizes, with thin versions also available.

Non-standard sizes, materials and finishes are available to order as specials, including small volume manufacture, modifications and custom parts made to drawings.

Metric Available Sizes & Materials
Thread Diameter	Grade 4 Steel	Grade 8 Steel	Grade 10 Steel	A2 Stainless Steel	A4 Stainless Steel

M4	On Request	On Request	On Request	On Request	On Request
M5		On Request	On Request
M6		On Request	On Request
M7	On Request	On Request	On Request
M8		On Request	On Request
M10		On Request	On Request
M12			On Request
M14		On Request	On Request
M16			On Request
M18		On Request	On Request
M20			On Request
M22		On Request	On Request
M24			On Request
M27		On Request	On Request
M30		On Request	On Request
M33		On Request	On Request	On Request	On Request
M36		On Request	On Request		On Request
M39		On Request	On Request	On Request	On Request
M42		On Request	On Request	On Request	On Request
M45		On Request	On Request	On Request	On Request
M48		On Request	On Request	On Request	On Request
M52		On Request	On Request	On Request	On Request
M56		On Request	On Request	On Request	On Request
M58	On Request	On Request	On Request	On Request	On Request
M60		On Request	On Request	On Request	On Request
M64		On Request	On Request	On Request	On Request
M68	On Request	On Request	On Request	On Request	On Request
M72	On Request	On Request	On Request	On Request	On Request
M76	On Request	On Request	On Request	On Request	On Request
M80	On Request	On Request	On Request	On Request	On Request
M85	On Request	On Request	On Request	On Request	On Request
M90	On Request	On Request	On Request	On Request	On Request
M95	On Request	On Request	On Request	On Request	On Request
M100	On Request	On Request	On Request	On Request	On Request

= Available Size not listed? Please contact us – we may be able to provide it.