Available here is a new 12 piece bumper bracket bolts, nuts and washers kit.
Kit includes:
Quantity 4: 1/2”-13 x 1-1/4” Grade 5 Coarse Thread Black Oxide Bumper Bolts
Quantity 4: 1/2”-13 Grade 5 Coarse Thread Hex Nuts
Quantity 4: 1/2” Conical Tooth Black Oxide Washers .53 id x 1.24 od x .12” thick.
Fits: GM vehicles from 1961-1984
Please check and compare to your fitment before purchasing.