Presented in this paper are the test results from an experimental investigation to characterize the thermal response for direct stresses in a hybrid steel-fibre-polymer composite connection having two resin injected bolts that restrain free thermal expansion. Details in the factual reporting are given for a new test methodology, from which recorded strains are presented as computed stresses using four specimens (in two pairs), with varying bolt positions (in clearance holes filled with injected resin). A Heiden Steady-State Sun Simulator is used to increase the surface temperature of the steel plate by about 30 ℃. On average, the stresses generated in the two plates are found to be relatively small. They reach a maximum magnitude of about 12 MPa in steel and about 3 MPa in the pultruded composite material. Test results showed that maximum stresses occur at the central position in the bolted connection specimens. Stress predictions from two analytical models provide more evidence that the thermal induced stresses are smaller than the stresses that bolted connections are designed for their combining effect is probably not going to limit the application of hybrid steel-composite connections with resin injected bolting that provide both slip and fatigue resistance.