sorry but i dont have any way of posting pictures on hear . the measurement is 3 1/2 from bolt hole to bolt hole .this cap looks identical to the one in the photo .if u want a pic sent to u i can send it to cell phone.
Thanks for the reply. The one that I posted will not fit as the cone part is too large in diameter. I would need something where the cone is smaller that 3 1/8 in diameter.