The bolt has always gotten the glory, but the nut is the real star. It can be round or square, winged or crenellated, easy to remove or impossible to remove. Around since the 15th century, it’s been ...

Greer castellated locking nuts come in a wide range of sizes in a hex configuration. The nylon-locking feature is usable in applications up to 250°F. The nylon insert resists most organic acids, oils, ...