Sorry if it isn’t the right forum for this sort of thing, but I was recently handed an old single speeder bike that was missing its rear wheel nuts… Anyone knows what spec I am looking for from looking at the picture with the tread pattern? I brought it to my local hardware store but they said they didn’t have what i needed…
Difficult to be 100% but you’ll probably need an imperial 3/8 inch fine thread nut. eBay is your friend here but your local hardware store might have something. You might get away with an M10 but as it’s an axle I’d try to get as precise as possible.
Likely 10x1. Get this from a bike shop or online. You’d have to find it at a nut and bolt supplier as opposed to a regular hardware store. You want an actual track nut though It has a flange on it that holds against the frame better.
Hard to tell for sure. A shop can help you check and get the right nuts. There are a handful of different “standards.”
Chances of being 3/8 are slim unless its a coaster brake.