Tennant Slotted Hex Nut 1.00-20 Thread – TN14242

Threaded 1.00-20 UNF fine-pitch and cut from steel, this Tennant slotted hex nut is made for cotter-pin retained assemblies on floor cleaning equipment. The slots across its top face let a cotter pin pass through and into a cross-drilled hole in the bolt or shaft, locking the nut mechanically so it cannot back off under vibration without relying on thread friction.

That retention method is standard at pivot points and wheel or axle positions where a plain nut would work loose over repeated cycling, since the cotter pin gives a positive stop rather than depending on friction alone. If the cotter pin shears or is left out during reassembly, the nut loses its anti-loosening feature and can spin off the thread once vibration sets in.

It installs as a direct replacement at cotter-pin retained hex nut positions on applicable Tennant machines. Match the thread size and the nut's slot pattern to the fastener coming off, since a fine-pitch nut will not run onto a coarse-pitch bolt.