For your bumper needs, 4 State Trucks carries the necessary bumper bolts for your International 8600 TranStar such as stainless steel bumper bolt kits which include 8 bolts, 8 washers, 8 nylon washers and 8 nyloc nuts. We also have 1/2-13 x 2" grade 5 chrome hex bolts, 1/2" chrome flat washers and 1/2" ID x 1" OD nylon bumper washers.