Yeah, but those are somewhat unique. I've not seen other propnuts which have a larger face than the nut itself. They've been installed that way since I've been aboard and they don't come off easily, trust me. I learned long ago that if something works don't mess with it. I bought a propsmith many years back as many shops at the time didn't have a 4 inch version on hand- so the prop is always seated/installed correctly.