Slotted Nuts
Slotted nuts are threaded nuts with slots machined into one end that allow a cotter pin or safety wire to pass through and lock the nut in position. American Bolt Corporation supplies slotted nuts for mechanical and industrial applications where positive locking against rotation is required.
Slotted nuts are commonly used in assemblies subject to vibration, motion, or load reversal where a mechanical locking method is preferred.
What Is a Slotted Nut?
A slotted nut features radial slots cut into the top portion of the nut. When installed on a bolt, stud, or threaded rod with a drilled cross-hole, the slots align with the hole, allowing a cotter pin or safety device to pass through and prevent the nut from backing off.
If a mating bolt does not already have a cross-hole, the shank of the bolt can be drilled to accommodate a cotter pin when the application requires positive locking. This locking method provides a physical stop rather than relying on friction alone.
Contact American Bolt Corp
For availability, material options, or help selecting the correct slotted nut — including in-house bolt drilling for cotter pin installation — contact American Bolt Corp. Our team can assist with sizing, material, and application requirements.