Doing a little digging through the websites of Fastenal and McMaster Carr, I found that Fastenal is much friendlier to low-number orders, while McMaster Carr won’t break up pieces below 5 or so. I priced out the following grade 8 fasteners:
7/16″ x 6″ bolts (2 pcs. for mounting the Hi-Lift jack)
7/16″ washers (2 pcs.)
7/16″ wingnuts (2 pcs.)
9/16 x 1.5″ bolts (6 pcs. for mounting the bumper to the frame)
9/16 x 2″ bolts (2 pcs. for mounting the outer section of the bumper to the frame)
9/16″ nuts (8 pcs.)
9/16″ lockwashers (8 pcs.)
1/2″ x 3″ fine thread bolts (3 pcs. for mounting the spare)
and got a total cost of $27.07 before tax. The next step will be to visit the Fastenal location in Elkridge and then the Ace Hardware out in Ellicott City to see whose prices are cheaper, and if it would pay to avoid shipping.
Update: Ace hardware doesn’t have grade 8 bolts longer than 4″, and no 9/16″ stock at all. Fastenal it is.