The nut that secures the trap under your sink. Makes cleaning it out a breeze. Although we’re hesitant to tell people to remove any nut with a pair of pliers, this one is designed to be loosened ...

Slide the castellated nut or nut-lock-and-nut combination off the spindle. If it's greasy, wipe it off with a lint-free rag and lay it on the rag next to the cotter pin.

When starting the corrective procedure of disassembling the drive arm, I removed the cotter pin from the castellated nut on the middle bolt and was surprised to see the bolt had not been torqued.

When the rear wheels are in place, it looks every bit like the wheels are mounted on an original rearend, right down to the cotter pins in the castellated "axle" nuts.

Volvo Bus Corporation (Volvo Bus) is recalling certain 2024 Volvo 9700 vehicles. The castellated nut securing the steering gear link rod to the steering arm may be loose and allow the link rod to ...