These wheel grommets are great, easier to fit than regular wheel grommets and the quality is really good considering the price. I am very happy with this product.
Pros
Specifications: Thread Pitch M14x2.0, Knurled Closed End End Nuts, 60 Degree Cone Seat, Size 19mm (3/4" Hex Wrench) and Hex Size 7/8". , Overall Length 4, 4"