There are a couple different options available to contractors if their project required a DOT inspection but the fasteners were not inspected before shipping from the manufacturer. Probably the simplest option is to have a DOT inspector come directly to the jobsite and approve the bolts at the jobsite. For an on-site inspection, the contractor would need to have a hard copy of all the certification documents ready upon inspection. The other option is to ship the bolts back to the manufacturer for an in-house inspection. This option can sometimes take more time with transit time in both directions along with scheduling the inspection.