This paper engages the bonding effect of concrete to improve the tensile behavior of a blind bolt when used in 4 T-stub connections through monotonic experimental investigation, where two connections are performed on one standard bolted and one blind-bolted, while other tests from concrete filled steel tubes are carried out on one standard bolted and one blind-bolted respectively. The failure modes and tension-displacement relationships of all specimens are presented comparatively. The tensile mechanism of blind bolt with concrete filled is proposed. The tensile bearing capacity of connections are compared with those achieved by using formula of EC3. It is found that the salient response such as yield strength and stiffness on connection has been improved because the loading-bearing mechanism of blind bolt considering the bonding effect of concrete is distinct from the original in virtue of sleeve wrapped by hardened concrete. The tensile bearing capacity of connection is more determined by the angle flange performance than affected by bonding effect of concrete. Traditional bolt can be replaced by blind bolt as connecting concrete-filled steel tube structure, which is explained that blind bolted connection filled with concrete produces much the same tensile performance than standard bolted. The ductility coefficient of connections are increased with concrete infilled.