There's an NOS Kingpin set available on Ebay right now, worth the money and yes its the correct part number. I'd jump on it.
https://www.ebay.com/itm/125263072209?hash=item1d2a42cbd1:g:ypcAAOSwxxpiWrt-
The king pin listed on the Ebay site listing is for the .866 pin the standard size of pin for a 1 Ton is .921