Those new wheel covers you picked up are really nice. They make your golf cart visually pop when you drive down the road, and they are cost-effective. You did notice a long-forgotten issue when you removed those OWM wheel skins for the new fancy ones. You have been running on three lug nuts instead of four on two different wheels. I'm sure the shade tree mobile mechanic told you it would be fine when he came up short. Well, we have thousands of these Yamaha Steel Lug Nuts. Let's get you a whole set of these aftermarket beauties shipped out, so you have a few spares on hand. It seems like every time we run maintenance on the shop carts, there is at least one that's down a nut. Having a few backups never hurts. These golf cart lug nuts are zinc-plated steel for durability. 12mm is the standard size for all Yamaha lugs, and therefore, this fits all models gas and electric! We should have provided enough info, but if you still want to look it up, the replacement Yamaha OEM number is 90179-12262. Call Buggies Unlimited and get one shipped to your door.