Dorman part# 090-055 or 65223: M22-1.5, has a hex head, quoted $6.75 from CarQuest. Motor Mite part# 65384: has a 3/8 drive head, quoted $12.49 from O'Reilly's. Length for both is about the same as the original fitting. However, keep in mind that these are straight threaded bolts. There is no expansion/flare to them so they might bottom out on the bolt's flange, and a crush washer might not be a bad idea.